{"version":3,"sources":["license.js","loader.js","container.js","ember-babel.js","ember-console.js","ember-environment.js","ember-metal.js","rsvp.js","bootstrap"],"sourcesContent":["/*!\n * @overview  Ember - JavaScript Application Framework\n * @copyright Copyright 2011-2017 Tilde Inc. and contributors\n *            Portions Copyright 2006-2011 Strobe Inc.\n *            Portions Copyright 2008-2011 Apple Inc. All rights reserved.\n * @license   Licensed under MIT license\n *            See https://raw.github.com/emberjs/ember.js/master/LICENSE\n * @version   2.18.0\n */\n","/*global process */\nvar enifed, requireModule, Ember;\nvar mainContext = this; // Used in ember-environment/lib/global.js\n\n(function() {\n    function missingModule(name, referrerName) {\n      if (referrerName) {\n        throw new Error('Could not find module ' + name + ' required by: ' + referrerName);\n      } else {\n        throw new Error('Could not find module ' + name);\n      }\n    }\n\n    function internalRequire(_name, referrerName) {\n      var name = _name;\n      var mod = registry[name];\n\n      if (!mod) {\n        name = name + '/index';\n        mod = registry[name];\n      }\n\n      var exports = seen[name];\n\n      if (exports !== undefined) {\n        return exports;\n      }\n\n      exports = seen[name] = {};\n\n      if (!mod) {\n        missingModule(_name, referrerName);\n      }\n\n      var deps = mod.deps;\n      var callback = mod.callback;\n      var reified = new Array(deps.length);\n\n      for (var i = 0; i < deps.length; i++) {\n        if (deps[i] === 'exports') {\n          reified[i] = exports;\n        } else if (deps[i] === 'require') {\n          reified[i] = requireModule;\n        } else {\n          reified[i] = internalRequire(deps[i], name);\n        }\n      }\n\n      callback.apply(this, reified);\n\n      return exports;\n    }\n\n  var isNode = typeof window === 'undefined' &&\n    typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';\n\n  if (!isNode) {\n    Ember = this.Ember = this.Ember || {};\n  }\n\n  if (typeof Ember === 'undefined') { Ember = {}; }\n\n  if (typeof Ember.__loader === 'undefined') {\n    var registry = {};\n    var seen = {};\n\n    enifed = function(name, deps, callback) {\n      var value = { };\n\n      if (!callback) {\n        value.deps = [];\n        value.callback = deps;\n      } else {\n        value.deps = deps;\n        value.callback = callback;\n      }\n\n      registry[name] = value;\n    };\n\n    requireModule = function(name) {\n      return internalRequire(name, null);\n    };\n\n    // setup `require` module\n    requireModule['default'] = requireModule;\n\n    requireModule.has = function registryHas(moduleName) {\n      return !!registry[moduleName] || !!registry[moduleName + '/index'];\n    };\n\n    requireModule._eak_seen = registry;\n\n    Ember.__loader = {\n      define: enifed,\n      require: requireModule,\n      registry: registry\n    };\n  } else {\n    enifed = Ember.__loader.define;\n    requireModule = Ember.__loader.require;\n  }\n})();\n","enifed('container', ['exports', 'ember-babel', 'ember-utils', 'ember-debug', 'ember/features'], function (exports, _emberBabel, _emberUtils, _emberDebug, _features) {\n  'use strict';\n\n  exports.Container = exports.privatize = exports.Registry = undefined;\n\n\n  /* globals Proxy */\n  var CONTAINER_OVERRIDE = (0, _emberUtils.symbol)('CONTAINER_OVERRIDE');\n\n  /**\n   A container used to instantiate and cache objects.\n  \n   Every `Container` must be associated with a `Registry`, which is referenced\n   to determine the factory and options that should be used to instantiate\n   objects.\n  \n   The public API for `Container` is still in flux and should not be considered\n   stable.\n  \n   @private\n   @class Container\n   */\n\n  var Container = function () {\n    function Container(registry) {\n      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n      (0, _emberBabel.classCallCheck)(this, Container);\n\n      this.registry = registry;\n      this.owner = options.owner || null;\n      this.cache = (0, _emberUtils.dictionary)(options.cache || null);\n      this.factoryManagerCache = (0, _emberUtils.dictionary)(options.factoryManagerCache || null);\n      this[CONTAINER_OVERRIDE] = undefined;\n      this.isDestroyed = false;\n\n      if (true) {\n        this.validationCache = (0, _emberUtils.dictionary)(options.validationCache || null);\n      }\n    }\n\n    /**\n     @private\n     @property registry\n     @type Registry\n     @since 1.11.0\n     */\n\n    /**\n     @private\n     @property cache\n     @type InheritingDict\n     */\n\n    /**\n     @private\n     @property validationCache\n     @type InheritingDict\n     */\n\n    /**\n     Given a fullName return a corresponding instance.\n      The default behavior is for lookup to return a singleton instance.\n     The singleton is scoped to the container, allowing multiple containers\n     to all have their own locally scoped singletons.\n      ```javascript\n     let registry = new Registry();\n     let container = registry.container();\n      registry.register('api:twitter', Twitter);\n      let twitter = container.lookup('api:twitter');\n      twitter instanceof Twitter; // => true\n      // by default the container will return singletons\n     let twitter2 = container.lookup('api:twitter');\n     twitter2 instanceof Twitter; // => true\n      twitter === twitter2; //=> true\n     ```\n      If singletons are not wanted, an optional flag can be provided at lookup.\n      ```javascript\n     let registry = new Registry();\n     let container = registry.container();\n      registry.register('api:twitter', Twitter);\n      let twitter = container.lookup('api:twitter', { singleton: false });\n     let twitter2 = container.lookup('api:twitter', { singleton: false });\n      twitter === twitter2; //=> false\n     ```\n      @private\n     @method lookup\n     @param {String} fullName\n     @param {Object} [options]\n     @param {String} [options.source] The fullname of the request source (used for local lookup)\n     @return {any}\n     */\n\n\n    Container.prototype.lookup = function lookup(fullName, options) {\n      (true && !(this.registry.isValidFullName(fullName)) && (0, _emberDebug.assert)('fullName must be a proper full name', this.registry.isValidFullName(fullName)));\n\n      return _lookup(this, this.registry.normalize(fullName), options);\n    };\n\n    Container.prototype.destroy = function destroy() {\n      destroyDestroyables(this);\n      this.isDestroyed = true;\n    };\n\n    Container.prototype.reset = function reset(fullName) {\n      if (fullName === undefined) {\n        resetCache(this);\n      } else {\n        resetMember(this, this.registry.normalize(fullName));\n      }\n    };\n\n    Container.prototype.ownerInjection = function ownerInjection() {\n      var _ref;\n\n      return _ref = {}, _ref[_emberUtils.OWNER] = this.owner, _ref;\n    };\n\n    Container.prototype._resolverCacheKey = function _resolverCacheKey(name, options) {\n      return this.registry.resolverCacheKey(name, options);\n    };\n\n    Container.prototype.factoryFor = function factoryFor(fullName) {\n      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n      var normalizedName = this.registry.normalize(fullName);\n\n      (true && !(this.registry.isValidFullName(normalizedName)) && (0, _emberDebug.assert)('fullName must be a proper full name', this.registry.isValidFullName(normalizedName)));\n\n\n      if (options.source) {\n        var expandedFullName = this.registry.expandLocalLookup(fullName, options);\n        // if expandLocalLookup returns falsey, we do not support local lookup\n        if (!_features.EMBER_MODULE_UNIFICATION) {\n          if (!expandedFullName) {\n            return;\n          }\n\n          normalizedName = expandedFullName;\n        } else if (expandedFullName) {\n          // with ember-module-unification, if expandLocalLookup returns something,\n          // pass it to the resolve without the source\n          normalizedName = expandedFullName;\n          options = {};\n        }\n      }\n\n      var cacheKey = this._resolverCacheKey(normalizedName, options);\n      var cached = this.factoryManagerCache[cacheKey];\n\n      if (cached !== undefined) {\n        return cached;\n      }\n\n      var factory = _features.EMBER_MODULE_UNIFICATION ? this.registry.resolve(normalizedName, options) : this.registry.resolve(normalizedName);\n\n      if (factory === undefined) {\n        return;\n      }\n\n      if (true && factory && typeof factory._onLookup === 'function') {\n        factory._onLookup(fullName);\n      }\n\n      var manager = new FactoryManager(this, factory, fullName, normalizedName);\n\n      if (true) {\n        manager = wrapManagerInDeprecationProxy(manager);\n      }\n\n      this.factoryManagerCache[cacheKey] = manager;\n      return manager;\n    };\n\n    return Container;\n  }();\n\n  /*\n   * Wrap a factory manager in a proxy which will not permit properties to be\n   * set on the manager.\n   */\n  function wrapManagerInDeprecationProxy(manager) {\n    if (_emberUtils.HAS_NATIVE_PROXY) {\n      var validator = {\n        set: function (obj, prop, value) {\n          throw new Error('You attempted to set \"' + prop + '\" on a factory manager created by container#factoryFor. A factory manager is a read-only construct.');\n        }\n      };\n\n      // Note:\n      // We have to proxy access to the manager here so that private property\n      // access doesn't cause the above errors to occur.\n      var m = manager;\n      var proxiedManager = {\n        class: m.class,\n        create: function (props) {\n          return m.create(props);\n        }\n      };\n\n      return new Proxy(proxiedManager, validator);\n    }\n\n    return manager;\n  }\n\n  function isSingleton(container, fullName) {\n    return container.registry.getOption(fullName, 'singleton') !== false;\n  }\n\n  function isInstantiatable(container, fullName) {\n    return container.registry.getOption(fullName, 'instantiate') !== false;\n  }\n\n  function _lookup(container, fullName) {\n    var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n\n    if (options.source) {\n      var expandedFullName = container.registry.expandLocalLookup(fullName, options);\n\n      if (!_features.EMBER_MODULE_UNIFICATION) {\n        // if expandLocalLookup returns falsey, we do not support local lookup\n        if (!expandedFullName) {\n          return;\n        }\n\n        fullName = expandedFullName;\n      } else if (expandedFullName) {\n        // with ember-module-unification, if expandLocalLookup returns something,\n        // pass it to the resolve without the source\n        fullName = expandedFullName;\n        options = {};\n      }\n    }\n\n    if (options.singleton !== false) {\n      var cacheKey = container._resolverCacheKey(fullName, options);\n      var cached = container.cache[cacheKey];\n      if (cached !== undefined) {\n        return cached;\n      }\n    }\n\n    return instantiateFactory(container, fullName, options);\n  }\n\n  function isSingletonClass(container, fullName, _ref2) {\n    var instantiate = _ref2.instantiate,\n        singleton = _ref2.singleton;\n\n    return singleton !== false && !instantiate && isSingleton(container, fullName) && !isInstantiatable(container, fullName);\n  }\n\n  function isSingletonInstance(container, fullName, _ref3) {\n    var instantiate = _ref3.instantiate,\n        singleton = _ref3.singleton;\n\n    return singleton !== false && instantiate !== false && isSingleton(container, fullName) && isInstantiatable(container, fullName);\n  }\n\n  function isFactoryClass(container, fullname, _ref4) {\n    var instantiate = _ref4.instantiate,\n        singleton = _ref4.singleton;\n\n    return instantiate === false && (singleton === false || !isSingleton(container, fullname)) && !isInstantiatable(container, fullname);\n  }\n\n  function isFactoryInstance(container, fullName, _ref5) {\n    var instantiate = _ref5.instantiate,\n        singleton = _ref5.singleton;\n\n    return instantiate !== false && (singleton !== false || isSingleton(container, fullName)) && isInstantiatable(container, fullName);\n  }\n\n  function instantiateFactory(container, fullName, options) {\n    var factoryManager = _features.EMBER_MODULE_UNIFICATION && options && options.source ? container.factoryFor(fullName, options) : container.factoryFor(fullName);\n\n    if (factoryManager === undefined) {\n      return;\n    }\n\n    // SomeClass { singleton: true, instantiate: true } | { singleton: true } | { instantiate: true } | {}\n    // By default majority of objects fall into this case\n    if (isSingletonInstance(container, fullName, options)) {\n      var cacheKey = container._resolverCacheKey(fullName, options);\n      return container.cache[cacheKey] = factoryManager.create();\n    }\n\n    // SomeClass { singleton: false, instantiate: true }\n    if (isFactoryInstance(container, fullName, options)) {\n      return factoryManager.create();\n    }\n\n    // SomeClass { singleton: true, instantiate: false } | { instantiate: false } | { singleton: false, instantiation: false }\n    if (isSingletonClass(container, fullName, options) || isFactoryClass(container, fullName, options)) {\n      return factoryManager.class;\n    }\n\n    throw new Error('Could not create factory');\n  }\n\n  function buildInjections(container, injections) {\n    var hash = {};\n    var isDynamic = false;\n\n    if (injections.length > 0) {\n      if (true) {\n        container.registry.validateInjections(injections);\n      }\n\n      var injection = void 0;\n      for (var i = 0; i < injections.length; i++) {\n        injection = injections[i];\n        hash[injection.property] = _lookup(container, injection.fullName);\n        if (!isDynamic) {\n          isDynamic = !isSingleton(container, injection.fullName);\n        }\n      }\n    }\n\n    return { injections: hash, isDynamic: isDynamic };\n  }\n\n  function injectionsFor(container, fullName) {\n    var registry = container.registry;\n\n    var _fullName$split = fullName.split(':'),\n        type = _fullName$split[0];\n\n    var injections = registry.getTypeInjections(type).concat(registry.getInjections(fullName));\n    return buildInjections(container, injections);\n  }\n\n  function destroyDestroyables(container) {\n    var cache = container.cache;\n    var keys = Object.keys(cache);\n\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i];\n      var value = cache[key];\n\n      if (value.destroy) {\n        value.destroy();\n      }\n    }\n  }\n\n  function resetCache(container) {\n    destroyDestroyables(container);\n    container.cache = (0, _emberUtils.dictionary)(null);\n    container.factoryManagerCache = (0, _emberUtils.dictionary)(null);\n  }\n\n  function resetMember(container, fullName) {\n    var member = container.cache[fullName];\n\n    delete container.factoryManagerCache[fullName];\n\n    if (member) {\n      delete container.cache[fullName];\n\n      if (member.destroy) {\n        member.destroy();\n      }\n    }\n  }\n\n  var FactoryManager = function () {\n    function FactoryManager(container, factory, fullName, normalizedName) {\n      (0, _emberBabel.classCallCheck)(this, FactoryManager);\n\n      this.container = container;\n      this.owner = container.owner;\n      this.class = factory;\n      this.fullName = fullName;\n      this.normalizedName = normalizedName;\n      this.madeToString = undefined;\n      this.injections = undefined;\n    }\n\n    FactoryManager.prototype.toString = function toString() {\n      if (this.madeToString === undefined) {\n        this.madeToString = this.container.registry.makeToString(this.class, this.fullName);\n      }\n\n      return this.madeToString;\n    };\n\n    FactoryManager.prototype.create = function create() {\n      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n      var injectionsCache = this.injections;\n      if (injectionsCache === undefined) {\n        var _injectionsFor = injectionsFor(this.container, this.normalizedName),\n            injections = _injectionsFor.injections,\n            isDynamic = _injectionsFor.isDynamic;\n\n        injectionsCache = injections;\n        if (!isDynamic) {\n          this.injections = injections;\n        }\n      }\n\n      var props = (0, _emberUtils.assign)({}, injectionsCache, options);\n\n      if (true) {\n        var lazyInjections = void 0;\n        var validationCache = this.container.validationCache;\n        // Ensure that all lazy injections are valid at instantiation time\n        if (!validationCache[this.fullName] && this.class && typeof this.class._lazyInjections === 'function') {\n          lazyInjections = this.class._lazyInjections();\n          lazyInjections = this.container.registry.normalizeInjectionsHash(lazyInjections);\n\n          this.container.registry.validateInjections(lazyInjections);\n        }\n\n        validationCache[this.fullName] = true;\n      }\n\n      if (!this.class.create) {\n        throw new Error('Failed to create an instance of \\'' + this.normalizedName + '\\'. Most likely an improperly defined class or' + ' an invalid module export.');\n      }\n\n      // required to allow access to things like\n      // the customized toString, _debugContainerKey,\n      // owner, etc. without a double extend and without\n      // modifying the objects properties\n      if (typeof this.class._initFactory === 'function') {\n        this.class._initFactory(this);\n      } else {\n        // in the non-EmberObject case we need to still setOwner\n        // this is required for supporting glimmer environment and\n        // template instantiation which rely heavily on\n        // `options[OWNER]` being passed into `create`\n        // TODO: clean this up, and remove in future versions\n        (0, _emberUtils.setOwner)(props, this.owner);\n      }\n\n      return this.class.create(props);\n    };\n\n    return FactoryManager;\n  }();\n\n  var VALID_FULL_NAME_REGEXP = /^[^:]+:[^:]+$/;\n\n  /**\n   A registry used to store factory and option information keyed\n   by type.\n  \n   A `Registry` stores the factory and option information needed by a\n   `Container` to instantiate and cache objects.\n  \n   The API for `Registry` is still in flux and should not be considered stable.\n  \n   @private\n   @class Registry\n   @since 1.11.0\n  */\n\n  var Registry = function () {\n    function Registry() {\n      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n      (0, _emberBabel.classCallCheck)(this, Registry);\n\n      this.fallback = options.fallback || null;\n      this.resolver = options.resolver || null;\n\n      if (typeof this.resolver === 'function') {\n        deprecateResolverFunction(this);\n      }\n\n      this.registrations = (0, _emberUtils.dictionary)(options.registrations || null);\n\n      this._typeInjections = (0, _emberUtils.dictionary)(null);\n      this._injections = (0, _emberUtils.dictionary)(null);\n\n      this._localLookupCache = Object.create(null);\n      this._normalizeCache = (0, _emberUtils.dictionary)(null);\n      this._resolveCache = (0, _emberUtils.dictionary)(null);\n      this._failCache = (0, _emberUtils.dictionary)(null);\n\n      this._options = (0, _emberUtils.dictionary)(null);\n      this._typeOptions = (0, _emberUtils.dictionary)(null);\n    }\n\n    /**\n     A backup registry for resolving registrations when no matches can be found.\n      @private\n     @property fallback\n     @type Registry\n     */\n\n    /**\n     An object that has a `resolve` method that resolves a name.\n      @private\n     @property resolver\n     @type Resolver\n     */\n\n    /**\n     @private\n     @property registrations\n     @type InheritingDict\n     */\n\n    /**\n     @private\n      @property _typeInjections\n     @type InheritingDict\n     */\n\n    /**\n     @private\n      @property _injections\n     @type InheritingDict\n     */\n\n    /**\n     @private\n      @property _normalizeCache\n     @type InheritingDict\n     */\n\n    /**\n     @private\n      @property _resolveCache\n     @type InheritingDict\n     */\n\n    /**\n     @private\n      @property _options\n     @type InheritingDict\n     */\n\n    /**\n     @private\n      @property _typeOptions\n     @type InheritingDict\n     */\n\n    /**\n     Creates a container based on this registry.\n      @private\n     @method container\n     @param {Object} options\n     @return {Container} created container\n     */\n\n\n    Registry.prototype.container = function container(options) {\n      return new Container(this, options);\n    };\n\n    Registry.prototype.register = function register(fullName, factory) {\n      var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n      (true && !(this.isValidFullName(fullName)) && (0, _emberDebug.assert)('fullName must be a proper full name', this.isValidFullName(fullName)));\n      (true && !(factory !== undefined) && (0, _emberDebug.assert)('Attempting to register an unknown factory: \\'' + fullName + '\\'', factory !== undefined));\n\n\n      var normalizedName = this.normalize(fullName);\n      (true && !(!this._resolveCache[normalizedName]) && (0, _emberDebug.assert)('Cannot re-register: \\'' + fullName + '\\', as it has already been resolved.', !this._resolveCache[normalizedName]));\n\n\n      delete this._failCache[normalizedName];\n      this.registrations[normalizedName] = factory;\n      this._options[normalizedName] = options;\n    };\n\n    Registry.prototype.unregister = function unregister(fullName) {\n      (true && !(this.isValidFullName(fullName)) && (0, _emberDebug.assert)('fullName must be a proper full name', this.isValidFullName(fullName)));\n\n\n      var normalizedName = this.normalize(fullName);\n\n      this._localLookupCache = Object.create(null);\n\n      delete this.registrations[normalizedName];\n      delete this._resolveCache[normalizedName];\n      delete this._failCache[normalizedName];\n      delete this._options[normalizedName];\n    };\n\n    Registry.prototype.resolve = function resolve(fullName, options) {\n      (true && !(this.isValidFullName(fullName)) && (0, _emberDebug.assert)('fullName must be a proper full name', this.isValidFullName(fullName)));\n\n      var factory = _resolve(this, this.normalize(fullName), options);\n      if (factory === undefined && this.fallback !== null) {\n        var _fallback;\n\n        factory = (_fallback = this.fallback).resolve.apply(_fallback, arguments);\n      }\n      return factory;\n    };\n\n    Registry.prototype.describe = function describe(fullName) {\n      if (this.resolver !== null && this.resolver.lookupDescription) {\n        return this.resolver.lookupDescription(fullName);\n      } else if (this.fallback !== null) {\n        return this.fallback.describe(fullName);\n      } else {\n        return fullName;\n      }\n    };\n\n    Registry.prototype.normalizeFullName = function normalizeFullName(fullName) {\n      if (this.resolver !== null && this.resolver.normalize) {\n        return this.resolver.normalize(fullName);\n      } else if (this.fallback !== null) {\n        return this.fallback.normalizeFullName(fullName);\n      } else {\n        return fullName;\n      }\n    };\n\n    Registry.prototype.normalize = function normalize(fullName) {\n      return this._normalizeCache[fullName] || (this._normalizeCache[fullName] = this.normalizeFullName(fullName));\n    };\n\n    Registry.prototype.makeToString = function makeToString(factory, fullName) {\n      if (this.resolver !== null && this.resolver.makeToString) {\n        return this.resolver.makeToString(factory, fullName);\n      } else if (this.fallback !== null) {\n        return this.fallback.makeToString(factory, fullName);\n      } else {\n        return factory.toString();\n      }\n    };\n\n    Registry.prototype.has = function has(fullName, options) {\n      if (!this.isValidFullName(fullName)) {\n        return false;\n      }\n\n      var source = options && options.source && this.normalize(options.source);\n\n      return _has(this, this.normalize(fullName), source);\n    };\n\n    Registry.prototype.optionsForType = function optionsForType(type, options) {\n      this._typeOptions[type] = options;\n    };\n\n    Registry.prototype.getOptionsForType = function getOptionsForType(type) {\n      var optionsForType = this._typeOptions[type];\n      if (optionsForType === undefined && this.fallback !== null) {\n        optionsForType = this.fallback.getOptionsForType(type);\n      }\n      return optionsForType;\n    };\n\n    Registry.prototype.options = function options(fullName) {\n      var _options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n      var normalizedName = this.normalize(fullName);\n      this._options[normalizedName] = _options;\n    };\n\n    Registry.prototype.getOptions = function getOptions(fullName) {\n      var normalizedName = this.normalize(fullName);\n      var options = this._options[normalizedName];\n\n      if (options === undefined && this.fallback !== null) {\n        options = this.fallback.getOptions(fullName);\n      }\n      return options;\n    };\n\n    Registry.prototype.getOption = function getOption(fullName, optionName) {\n      var options = this._options[fullName];\n\n      if (options && options[optionName] !== undefined) {\n        return options[optionName];\n      }\n\n      var type = fullName.split(':')[0];\n      options = this._typeOptions[type];\n\n      if (options && options[optionName] !== undefined) {\n        return options[optionName];\n      } else if (this.fallback !== null) {\n        return this.fallback.getOption(fullName, optionName);\n      }\n    };\n\n    Registry.prototype.typeInjection = function typeInjection(type, property, fullName) {\n      (true && !(this.isValidFullName(fullName)) && (0, _emberDebug.assert)('fullName must be a proper full name', this.isValidFullName(fullName)));\n\n\n      var fullNameType = fullName.split(':')[0];\n      (true && !(fullNameType !== type) && (0, _emberDebug.assert)('Cannot inject a \\'' + fullName + '\\' on other ' + type + '(s).', fullNameType !== type));\n\n\n      var injections = this._typeInjections[type] || (this._typeInjections[type] = []);\n\n      injections.push({ property: property, fullName: fullName });\n    };\n\n    Registry.prototype.injection = function injection(fullName, property, injectionName) {\n      (true && !(this.isValidFullName(injectionName)) && (0, _emberDebug.assert)('Invalid injectionName, expected: \\'type:name\\' got: ' + injectionName, this.isValidFullName(injectionName)));\n\n\n      var normalizedInjectionName = this.normalize(injectionName);\n\n      if (fullName.indexOf(':') === -1) {\n        return this.typeInjection(fullName, property, normalizedInjectionName);\n      }\n\n      (true && !(this.isValidFullName(fullName)) && (0, _emberDebug.assert)('fullName must be a proper full name', this.isValidFullName(fullName)));\n\n      var normalizedName = this.normalize(fullName);\n\n      var injections = this._injections[normalizedName] || (this._injections[normalizedName] = []);\n\n      injections.push({ property: property, fullName: normalizedInjectionName });\n    };\n\n    Registry.prototype.knownForType = function knownForType(type) {\n      var fallbackKnown = void 0,\n          resolverKnown = void 0;\n\n      var localKnown = (0, _emberUtils.dictionary)(null);\n      var registeredNames = Object.keys(this.registrations);\n      for (var index = 0; index < registeredNames.length; index++) {\n        var fullName = registeredNames[index];\n        var itemType = fullName.split(':')[0];\n\n        if (itemType === type) {\n          localKnown[fullName] = true;\n        }\n      }\n\n      if (this.fallback !== null) {\n        fallbackKnown = this.fallback.knownForType(type);\n      }\n\n      if (this.resolver !== null && this.resolver.knownForType) {\n        resolverKnown = this.resolver.knownForType(type);\n      }\n\n      return (0, _emberUtils.assign)({}, fallbackKnown, localKnown, resolverKnown);\n    };\n\n    Registry.prototype.isValidFullName = function isValidFullName(fullName) {\n      return VALID_FULL_NAME_REGEXP.test(fullName);\n    };\n\n    Registry.prototype.getInjections = function getInjections(fullName) {\n      var injections = this._injections[fullName] || [];\n      if (this.fallback !== null) {\n        injections = injections.concat(this.fallback.getInjections(fullName));\n      }\n      return injections;\n    };\n\n    Registry.prototype.getTypeInjections = function getTypeInjections(type) {\n      var injections = this._typeInjections[type] || [];\n      if (this.fallback !== null) {\n        injections = injections.concat(this.fallback.getTypeInjections(type));\n      }\n      return injections;\n    };\n\n    Registry.prototype.resolverCacheKey = function resolverCacheKey(name, options) {\n      if (!_features.EMBER_MODULE_UNIFICATION) {\n        return name;\n      }\n\n      return options && options.source ? options.source + ':' + name : name;\n    };\n\n    Registry.prototype.expandLocalLookup = function expandLocalLookup(fullName, options) {\n      if (this.resolver !== null && this.resolver.expandLocalLookup) {\n        (true && !(this.isValidFullName(fullName)) && (0, _emberDebug.assert)('fullName must be a proper full name', this.isValidFullName(fullName)));\n        (true && !(options && options.source) && (0, _emberDebug.assert)('options.source must be provided to expandLocalLookup', options && options.source));\n        (true && !(this.isValidFullName(options.source)) && (0, _emberDebug.assert)('options.source must be a proper full name', this.isValidFullName(options.source)));\n\n\n        var normalizedFullName = this.normalize(fullName);\n        var normalizedSource = this.normalize(options.source);\n\n        return _expandLocalLookup(this, normalizedFullName, normalizedSource);\n      } else if (this.fallback !== null) {\n        return this.fallback.expandLocalLookup(fullName, options);\n      } else {\n        return null;\n      }\n    };\n\n    return Registry;\n  }();\n\n  function deprecateResolverFunction(registry) {\n    (true && !(false) && (0, _emberDebug.deprecate)('Passing a `resolver` function into a Registry is deprecated. Please pass in a Resolver object with a `resolve` method.', false, { id: 'ember-application.registry-resolver-as-function', until: '3.0.0', url: 'https://emberjs.com/deprecations/v2.x#toc_registry-resolver-as-function' }));\n\n    registry.resolver = { resolve: registry.resolver };\n  }\n\n  if (true) {\n    Registry.prototype.normalizeInjectionsHash = function (hash) {\n      var injections = [];\n\n      for (var key in hash) {\n        if (hash.hasOwnProperty(key)) {\n          (true && !(this.isValidFullName(hash[key])) && (0, _emberDebug.assert)('Expected a proper full name, given \\'' + hash[key] + '\\'', this.isValidFullName(hash[key])));\n\n\n          injections.push({\n            property: key,\n            fullName: hash[key]\n          });\n        }\n      }\n\n      return injections;\n    };\n\n    Registry.prototype.validateInjections = function (injections) {\n      if (!injections) {\n        return;\n      }\n\n      var fullName = void 0;\n\n      for (var i = 0; i < injections.length; i++) {\n        fullName = injections[i].fullName;\n\n        (true && !(this.has(fullName)) && (0, _emberDebug.assert)('Attempting to inject an unknown injection: \\'' + fullName + '\\'', this.has(fullName)));\n      }\n    };\n  }\n\n  function _expandLocalLookup(registry, normalizedName, normalizedSource) {\n    var cache = registry._localLookupCache;\n    var normalizedNameCache = cache[normalizedName];\n\n    if (!normalizedNameCache) {\n      normalizedNameCache = cache[normalizedName] = Object.create(null);\n    }\n\n    var cached = normalizedNameCache[normalizedSource];\n\n    if (cached !== undefined) {\n      return cached;\n    }\n\n    var expanded = registry.resolver.expandLocalLookup(normalizedName, normalizedSource);\n\n    return normalizedNameCache[normalizedSource] = expanded;\n  }\n\n  function _resolve(registry, normalizedName, options) {\n    if (options && options.source) {\n      // when `source` is provided expand normalizedName\n      // and source into the full normalizedName\n      var expandedNormalizedName = registry.expandLocalLookup(normalizedName, options);\n\n      // if expandLocalLookup returns falsey, we do not support local lookup\n      if (!_features.EMBER_MODULE_UNIFICATION) {\n        if (!expandedNormalizedName) {\n          return;\n        }\n\n        normalizedName = expandedNormalizedName;\n      } else if (expandedNormalizedName) {\n        // with ember-module-unification, if expandLocalLookup returns something,\n        // pass it to the resolve without the source\n        normalizedName = expandedNormalizedName;\n        options = {};\n      }\n    }\n\n    var cacheKey = registry.resolverCacheKey(normalizedName, options);\n    var cached = registry._resolveCache[cacheKey];\n    if (cached !== undefined) {\n      return cached;\n    }\n    if (registry._failCache[cacheKey]) {\n      return;\n    }\n\n    var resolved = void 0;\n\n    if (registry.resolver) {\n      resolved = registry.resolver.resolve(normalizedName, options && options.source);\n    }\n\n    if (resolved === undefined) {\n      resolved = registry.registrations[normalizedName];\n    }\n\n    if (resolved === undefined) {\n      registry._failCache[cacheKey] = true;\n    } else {\n      registry._resolveCache[cacheKey] = resolved;\n    }\n\n    return resolved;\n  }\n\n  function _has(registry, fullName, source) {\n    return registry.resolve(fullName, { source: source }) !== undefined;\n  }\n\n  var privateNames = (0, _emberUtils.dictionary)(null);\n  var privateSuffix = ('' + Math.random() + Date.now()).replace('.', '');\n\n  function privatize(_ref6) {\n    var fullName = _ref6[0];\n\n    var name = privateNames[fullName];\n    if (name) {\n      return name;\n    }\n\n    var _fullName$split2 = fullName.split(':'),\n        type = _fullName$split2[0],\n        rawName = _fullName$split2[1];\n\n    return privateNames[fullName] = (0, _emberUtils.intern)(type + ':' + rawName + '-' + privateSuffix);\n  }\n\n  /*\n  Public API for the container is still in flux.\n  The public API, specified on the application namespace should be considered the stable API.\n  // @module container\n    @private\n  */\n\n  exports.Registry = Registry;\n  exports.privatize = privatize;\n  exports.Container = Container;\n});","enifed('ember-babel', ['exports'], function (exports) {\n  'use strict';\n\n  exports.classCallCheck = classCallCheck;\n  exports.inherits = inherits;\n  exports.taggedTemplateLiteralLoose = taggedTemplateLiteralLoose;\n  exports.createClass = createClass;\n  exports.defaults = defaults;\n  function classCallCheck(instance, Constructor) {\n    if (!(instance instanceof Constructor)) {\n      throw new TypeError('Cannot call a class as a function');\n    }\n  }\n\n  function inherits(subClass, superClass) {\n    if (typeof superClass !== 'function' && superClass !== null) {\n      throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass);\n    }\n\n    subClass.prototype = Object.create(superClass && superClass.prototype, {\n      constructor: {\n        value: subClass,\n        enumerable: false,\n        writable: true,\n        configurable: true\n      }\n    });\n\n    if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : defaults(subClass, superClass);\n  }\n\n  function taggedTemplateLiteralLoose(strings, raw) {\n    strings.raw = raw;\n    return strings;\n  }\n\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if ('value' in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  function createClass(Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  }\n\n  function defaults(obj, defaults) {\n    var keys = Object.getOwnPropertyNames(defaults);\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i];\n      var value = Object.getOwnPropertyDescriptor(defaults, key);\n      if (value && value.configurable && obj[key] === undefined) {\n        Object.defineProperty(obj, key, value);\n      }\n    }\n    return obj;\n  }\n\n  var possibleConstructorReturn = exports.possibleConstructorReturn = function (self, call) {\n    if (!self) {\n      throw new ReferenceError('this hasn\\'t been initialized - super() hasn\\'t been called');\n    }\n    return call && (typeof call === 'object' || typeof call === 'function') ? call : self;\n  };\n\n  var slice = exports.slice = Array.prototype.slice;\n});","enifed('ember-console', ['exports', 'ember-environment'], function (exports, _emberEnvironment) {\n  'use strict';\n\n  function K() {}\n\n  function consoleMethod(name) {\n    var consoleObj = void 0;\n    if (_emberEnvironment.context.imports.console) {\n      consoleObj = _emberEnvironment.context.imports.console;\n    } else if (typeof console !== 'undefined') {\n      // eslint-disable-line no-undef\n      consoleObj = console; // eslint-disable-line no-undef\n    }\n\n    var method = typeof consoleObj === 'object' ? consoleObj[name] : null;\n\n    if (typeof method !== 'function') {\n      return;\n    }\n\n    return method.bind(consoleObj);\n  }\n\n  function assertPolyfill(test, message) {\n    if (!test) {\n      try {\n        // attempt to preserve the stack\n        throw new Error('assertion failed: ' + message);\n      } catch (error) {\n        setTimeout(function () {\n          throw error;\n        }, 0);\n      }\n    }\n  }\n\n  /**\n    Inside Ember-Metal, simply uses the methods from `imports.console`.\n    Override this to provide more robust logging functionality.\n  \n    @class Logger\n    @namespace Ember\n    @public\n  */\n  var index = {\n    /**\n     Logs the arguments to the console.\n     You can pass as many arguments as you want and they will be joined together with a space.\n       ```javascript\n      var foo = 1;\n      Ember.Logger.log('log value of foo:', foo);\n      // \"log value of foo: 1\" will be printed to the console\n      ```\n      @method log\n     @for Ember.Logger\n     @param {*} arguments\n     @public\n    */\n    log: consoleMethod('log') || K,\n\n    /**\n     Prints the arguments to the console with a warning icon.\n     You can pass as many arguments as you want and they will be joined together with a space.\n       ```javascript\n      Ember.Logger.warn('Something happened!');\n      // \"Something happened!\" will be printed to the console with a warning icon.\n      ```\n      @method warn\n     @for Ember.Logger\n     @param {*} arguments\n     @public\n    */\n    warn: consoleMethod('warn') || K,\n\n    /**\n     Prints the arguments to the console with an error icon, red text and a stack trace.\n     You can pass as many arguments as you want and they will be joined together with a space.\n       ```javascript\n      Ember.Logger.error('Danger! Danger!');\n      // \"Danger! Danger!\" will be printed to the console in red text.\n      ```\n      @method error\n     @for Ember.Logger\n     @param {*} arguments\n     @public\n    */\n    error: consoleMethod('error') || K,\n\n    /**\n     Logs the arguments to the console.\n     You can pass as many arguments as you want and they will be joined together with a space.\n       ```javascript\n      var foo = 1;\n      Ember.Logger.info('log value of foo:', foo);\n      // \"log value of foo: 1\" will be printed to the console\n      ```\n      @method info\n     @for Ember.Logger\n     @param {*} arguments\n     @public\n    */\n    info: consoleMethod('info') || K,\n\n    /**\n     Logs the arguments to the console in blue text.\n     You can pass as many arguments as you want and they will be joined together with a space.\n       ```javascript\n      var foo = 1;\n      Ember.Logger.debug('log value of foo:', foo);\n      // \"log value of foo: 1\" will be printed to the console\n      ```\n      @method debug\n     @for Ember.Logger\n     @param {*} arguments\n     @public\n    */\n    debug: consoleMethod('debug') || consoleMethod('info') || K,\n\n    /**\n     If the value passed into `Ember.Logger.assert` is not truthy it will throw an error with a stack trace.\n       ```javascript\n      Ember.Logger.assert(true); // undefined\n      Ember.Logger.assert(true === false); // Throws an Assertion failed error.\n      Ember.Logger.assert(true === false, 'Something invalid'); // Throws an Assertion failed error with message.\n      ```\n      @method assert\n     @for Ember.Logger\n     @param {Boolean} bool Value to test\n     @param {String} message Assertion message on failed\n     @public\n    */\n    assert: consoleMethod('assert') || assertPolyfill\n  };\n\n  exports.default = index;\n});","enifed('ember-environment', ['exports'], function (exports) {\n  'use strict';\n\n  /* globals global, window, self, mainContext */\n\n  // from lodash to catch fake globals\n  function checkGlobal(value) {\n    return value && value.Object === Object ? value : undefined;\n  }\n\n  // element ids can ruin global miss checks\n  function checkElementIdShadowing(value) {\n    return value && value.nodeType === undefined ? value : undefined;\n  }\n\n  // export real global\n  var global$1 = checkGlobal(checkElementIdShadowing(typeof global === 'object' && global)) || checkGlobal(typeof self === 'object' && self) || checkGlobal(typeof window === 'object' && window) || mainContext || // set before strict mode in Ember loader/wrapper\n  new Function('return this')(); // eval outside of strict mode\n\n  function defaultTrue(v) {\n    return v === false ? false : true;\n  }\n\n  function defaultFalse(v) {\n    return v === true ? true : false;\n  }\n\n  function normalizeExtendPrototypes(obj) {\n    if (obj === false) {\n      return { String: false, Array: false, Function: false };\n    } else if (!obj || obj === true) {\n      return { String: true, Array: true, Function: true };\n    } else {\n      return {\n        String: defaultTrue(obj.String),\n        Array: defaultTrue(obj.Array),\n        Function: defaultTrue(obj.Function)\n      };\n    }\n  }\n\n  /* globals module */\n  /**\n    The hash of environment variables used to control various configuration\n    settings. To specify your own or override default settings, add the\n    desired properties to a global hash named `EmberENV` (or `ENV` for\n    backwards compatibility with earlier versions of Ember). The `EmberENV`\n    hash must be created before loading Ember.\n  \n    @class EmberENV\n    @type Object\n    @public\n  */\n  var ENV = typeof global$1.EmberENV === 'object' && global$1.EmberENV || typeof global$1.ENV === 'object' && global$1.ENV || {};\n\n  // ENABLE_ALL_FEATURES was documented, but you can't actually enable non optional features.\n  if (ENV.ENABLE_ALL_FEATURES) {\n    ENV.ENABLE_OPTIONAL_FEATURES = true;\n  }\n\n  /**\n    Determines whether Ember should add to `Array`, `Function`, and `String`\n    native object prototypes, a few extra methods in order to provide a more\n    friendly API.\n  \n    We generally recommend leaving this option set to true however, if you need\n    to turn it off, you can add the configuration property\n    `EXTEND_PROTOTYPES` to `EmberENV` and set it to `false`.\n  \n    Note, when disabled (the default configuration for Ember Addons), you will\n    instead have to access all methods and functions from the Ember\n    namespace.\n  \n    @property EXTEND_PROTOTYPES\n    @type Boolean\n    @default true\n    @for EmberENV\n    @public\n  */\n  ENV.EXTEND_PROTOTYPES = normalizeExtendPrototypes(ENV.EXTEND_PROTOTYPES);\n\n  /**\n    The `LOG_STACKTRACE_ON_DEPRECATION` property, when true, tells Ember to log\n    a full stack trace during deprecation warnings.\n  \n    @property LOG_STACKTRACE_ON_DEPRECATION\n    @type Boolean\n    @default true\n    @for EmberENV\n    @public\n  */\n  ENV.LOG_STACKTRACE_ON_DEPRECATION = defaultTrue(ENV.LOG_STACKTRACE_ON_DEPRECATION);\n\n  /**\n    The `LOG_VERSION` property, when true, tells Ember to log versions of all\n    dependent libraries in use.\n  \n    @property LOG_VERSION\n    @type Boolean\n    @default true\n    @for EmberENV\n    @public\n  */\n  ENV.LOG_VERSION = defaultTrue(ENV.LOG_VERSION);\n\n  /**\n    Debug parameter you can turn on. This will log all bindings that fire to\n    the console. This should be disabled in production code. Note that you\n    can also enable this from the console or temporarily.\n  \n    @property LOG_BINDINGS\n    @for EmberENV\n    @type Boolean\n    @default false\n    @public\n  */\n  ENV.LOG_BINDINGS = defaultFalse(ENV.LOG_BINDINGS);\n\n  ENV.RAISE_ON_DEPRECATION = defaultFalse(ENV.RAISE_ON_DEPRECATION);\n\n  // check if window exists and actually is the global\n  var hasDOM = typeof window !== 'undefined' && window === global$1 && window.document && window.document.createElement && !ENV.disableBrowserEnvironment; // is this a public thing?\n\n  // legacy imports/exports/lookup stuff (should we keep this??)\n  var originalContext = global$1.Ember || {};\n\n  var context = {\n    // import jQuery\n    imports: originalContext.imports || global$1,\n    // export Ember\n    exports: originalContext.exports || global$1,\n    // search for Namespaces\n    lookup: originalContext.lookup || global$1\n  };\n\n  // TODO: cleanup single source of truth issues with this stuff\n  var environment = hasDOM ? {\n    hasDOM: true,\n    isChrome: !!window.chrome && !window.opera,\n    isFirefox: typeof InstallTrigger !== 'undefined',\n    isPhantom: !!window.callPhantom,\n    location: window.location,\n    history: window.history,\n    userAgent: window.navigator.userAgent,\n    window: window\n  } : {\n    hasDOM: false,\n    isChrome: false,\n    isFirefox: false,\n    isPhantom: false,\n    location: null,\n    history: null,\n    userAgent: 'Lynx (textmode)',\n    window: null\n  };\n\n  exports.ENV = ENV;\n  exports.context = context;\n  exports.environment = environment;\n});","enifed('ember-metal', ['exports', 'ember-environment', 'ember-utils', 'ember-debug', 'ember-babel', 'ember/features', '@glimmer/reference', 'require', 'ember-console', 'backburner'], function (exports, emberEnvironment, emberUtils, emberDebug, emberBabel, ember_features, _glimmer_reference, require, Logger, Backburner) {\n  'use strict';\n\n  require = 'default' in require ? require['default'] : require;\n  Logger = 'default' in Logger ? Logger['default'] : Logger;\n  Backburner = 'default' in Backburner ? Backburner['default'] : Backburner;\n\n  /**\n  @module ember\n  */\n\n  /**\n    This namespace contains all Ember methods and functions. Future versions of\n    Ember may overwrite this namespace and therefore, you should avoid adding any\n    new properties.\n  \n    At the heart of Ember is Ember-Runtime, a set of core functions that provide\n    cross-platform compatibility and object property observing.  Ember-Runtime is\n    small and performance-focused so you can use it alongside other\n    cross-platform libraries such as jQuery. For more details, see\n    [Ember-Runtime](https://emberjs.com/api/modules/ember-runtime.html).\n  \n    @class Ember\n    @static\n    @public\n  */\n  var Ember = typeof emberEnvironment.context.imports.Ember === 'object' && emberEnvironment.context.imports.Ember || {};\n\n  // Make sure these are set whether Ember was already defined or not\n  Ember.isNamespace = true;\n  Ember.toString = function () {\n    return 'Ember';\n  };\n\n  /*\n   When we render a rich template hierarchy, the set of events that\n   *might* happen tends to be much larger than the set of events that\n   actually happen. This implies that we should make listener creation &\n   destruction cheap, even at the cost of making event dispatch more\n   expensive.\n  \n   Thus we store a new listener with a single push and no new\n   allocations, without even bothering to do deduplication -- we can\n   save that for dispatch time, if an event actually happens.\n   */\n\n  /* listener flags */\n  var ONCE = 1;\n  var SUSPENDED = 2;\n\n  var protoMethods = {\n    addToListeners: function (eventName, target, method, flags) {\n      if (this._listeners === undefined) {\n        this._listeners = [];\n      }\n      this._listeners.push(eventName, target, method, flags);\n    },\n    _finalizeListeners: function () {\n      if (this._listenersFinalized) {\n        return;\n      }\n      if (this._listeners === undefined) {\n        this._listeners = [];\n      }\n      var pointer = this.parent;\n      while (pointer !== undefined) {\n        var listeners = pointer._listeners;\n        if (listeners !== undefined) {\n          this._listeners = this._listeners.concat(listeners);\n        }\n        if (pointer._listenersFinalized) {\n          break;\n        }\n        pointer = pointer.parent;\n      }\n      this._listenersFinalized = true;\n    },\n    removeFromListeners: function (eventName, target, method, didRemove) {\n      var pointer = this;\n      while (pointer !== undefined) {\n        var listeners = pointer._listeners;\n        if (listeners !== undefined) {\n          for (var index = listeners.length - 4; index >= 0; index -= 4) {\n            if (listeners[index] === eventName && (!method || listeners[index + 1] === target && listeners[index + 2] === method)) {\n              if (pointer === this) {\n                // we are modifying our own list, so we edit directly\n                if (typeof didRemove === 'function') {\n                  didRemove(eventName, target, listeners[index + 2]);\n                }\n                listeners.splice(index, 4);\n              } else {\n                // we are trying to remove an inherited listener, so we do\n                // just-in-time copying to detach our own listeners from\n                // our inheritance chain.\n                this._finalizeListeners();\n                return this.removeFromListeners(eventName, target, method);\n              }\n            }\n          }\n        }\n        if (pointer._listenersFinalized) {\n          break;\n        }\n        pointer = pointer.parent;\n      }\n    },\n    matchingListeners: function (eventName) {\n      var pointer = this;\n      var result = void 0;\n      while (pointer !== undefined) {\n        var listeners = pointer._listeners;\n        if (listeners !== undefined) {\n          for (var index = 0; index < listeners.length; index += 4) {\n            if (listeners[index] === eventName) {\n              result = result || [];\n              pushUniqueListener(result, listeners, index);\n            }\n          }\n        }\n        if (pointer._listenersFinalized) {\n          break;\n        }\n        pointer = pointer.parent;\n      }\n      var sus = this._suspendedListeners;\n      if (sus !== undefined && result !== undefined) {\n        for (var susIndex = 0; susIndex < sus.length; susIndex += 3) {\n          if (eventName === sus[susIndex]) {\n            for (var resultIndex = 0; resultIndex < result.length; resultIndex += 3) {\n              if (result[resultIndex] === sus[susIndex + 1] && result[resultIndex + 1] === sus[susIndex + 2]) {\n                result[resultIndex + 2] |= SUSPENDED;\n              }\n            }\n          }\n        }\n      }\n      return result;\n    },\n    suspendListeners: function (eventNames, target, method, callback) {\n      var sus = this._suspendedListeners;\n      if (sus === undefined) {\n        sus = this._suspendedListeners = [];\n      }\n      for (var i = 0; i < eventNames.length; i++) {\n        sus.push(eventNames[i], target, method);\n      }\n      try {\n        return callback.call(target);\n      } finally {\n        if (sus.length === eventNames.length) {\n          this._suspendedListeners = undefined;\n        } else {\n          for (var _i = sus.length - 3; _i >= 0; _i -= 3) {\n            if (sus[_i + 1] === target && sus[_i + 2] === method && eventNames.indexOf(sus[_i]) !== -1) {\n              sus.splice(_i, 3);\n            }\n          }\n        }\n      }\n    },\n    watchedEvents: function () {\n      var pointer = this;\n      var names = {};\n      while (pointer !== undefined) {\n        var listeners = pointer._listeners;\n        if (listeners !== undefined) {\n          for (var index = 0; index < listeners.length; index += 4) {\n            names[listeners[index]] = true;\n          }\n        }\n        if (pointer._listenersFinalized) {\n          break;\n        }\n        pointer = pointer.parent;\n      }\n      return Object.keys(names);\n    }\n  };\n\n  function pushUniqueListener(destination, source, index) {\n    var target = source[index + 1];\n    var method = source[index + 2];\n    for (var destinationIndex = 0; destinationIndex < destination.length; destinationIndex += 3) {\n      if (destination[destinationIndex] === target && destination[destinationIndex + 1] === method) {\n        return;\n      }\n    }\n    destination.push(target, method, source[index + 3]);\n  }\n\n  /**\n  @module @ember/object\n  */\n  /*\n    The event system uses a series of nested hashes to store listeners on an\n    object. When a listener is registered, or when an event arrives, these\n    hashes are consulted to determine which target and action pair to invoke.\n  \n    The hashes are stored in the object's meta hash, and look like this:\n  \n        // Object's meta hash\n        {\n          listeners: {       // variable name: `listenerSet`\n            \"foo:changed\": [ // variable name: `actions`\n              target, method, flags\n            ]\n          }\n        }\n  \n  */\n\n  /**\n    Add an event listener\n  \n    @method addListener\n    @static\n    @for @ember/object/events\n    @param obj\n    @param {String} eventName\n    @param {Object|Function} target A target object or a function\n    @param {Function|String} method A function or the name of a function to be called on `target`\n    @param {Boolean} once A flag whether a function should only be called once\n    @public\n  */\n  function addListener(obj, eventName, target, method, once) {\n    true && !(!!obj && !!eventName) && emberDebug.assert('You must pass at least an object and event name to addListener', !!obj && !!eventName);\n    true && !(eventName !== 'didInitAttrs') && emberDebug.deprecate('didInitAttrs called in ' + (obj && obj.toString && obj.toString()) + '.', eventName !== 'didInitAttrs', {\n      id: 'ember-views.did-init-attrs',\n      until: '3.0.0',\n      url: 'https://emberjs.com/deprecations/v2.x#toc_ember-component-didinitattrs'\n    });\n\n    if (!method && 'function' === typeof target) {\n      method = target;\n      target = null;\n    }\n\n    var flags = 0;\n    if (once) {\n      flags |= ONCE;\n    }\n\n    meta(obj).addToListeners(eventName, target, method, flags);\n\n    if ('function' === typeof obj.didAddListener) {\n      obj.didAddListener(eventName, target, method);\n    }\n  }\n\n  /**\n    Remove an event listener\n  \n    Arguments should match those passed to `addListener`.\n  \n    @method removeListener\n    @static\n    @for @ember/object/events\n    @param obj\n    @param {String} eventName\n    @param {Object|Function} target A target object or a function\n    @param {Function|String} method A function or the name of a function to be called on `target`\n    @public\n  */\n  function removeListener(obj, eventName, target, method) {\n    true && !(!!obj && !!eventName) && emberDebug.assert('You must pass at least an object and event name to removeListener', !!obj && !!eventName);\n\n    if (!method && 'function' === typeof target) {\n      method = target;\n      target = null;\n    }\n\n    var func = 'function' === typeof obj.didRemoveListener ? obj.didRemoveListener.bind(obj) : function () {};\n    meta(obj).removeFromListeners(eventName, target, method, func);\n  }\n\n  /**\n    Suspend listener during callback.\n  \n    This should only be used by the target of the event listener\n    when it is taking an action that would cause the event, e.g.\n    an object might suspend its property change listener while it is\n    setting that property.\n  \n    @method suspendListener\n    @static\n    @for @ember/object/events\n  \n    @private\n    @param obj\n    @param {String} eventName\n    @param {Object|Function} target A target object or a function\n    @param {Function|String} method A function or the name of a function to be called on `target`\n    @param {Function} callback\n  */\n  function suspendListener(obj, eventName, target, method, callback) {\n    return suspendListeners(obj, [eventName], target, method, callback);\n  }\n\n  /**\n    Suspends multiple listeners during a callback.\n  \n    @method suspendListeners\n    @static\n    @for @ember/object/events\n  \n    @private\n    @param obj\n    @param {Array} eventNames Array of event names\n    @param {Object|Function} target A target object or a function\n    @param {Function|String} method A function or the name of a function to be called on `target`\n    @param {Function} callback\n  */\n  function suspendListeners(obj, eventNames, target, method, callback) {\n    if (!method && 'function' === typeof target) {\n      method = target;\n      target = null;\n    }\n    return meta(obj).suspendListeners(eventNames, target, method, callback);\n  }\n\n  /**\n    Return a list of currently watched events\n  \n    @private\n    @method watchedEvents\n    @static\n    @for @ember/object/events\n    @param obj\n  */\n  function watchedEvents(obj) {\n    var meta$$1 = exports.peekMeta(obj);\n    return meta$$1 !== undefined ? meta$$1.watchedEvents() : [];\n  }\n\n  /**\n    Send an event. The execution of suspended listeners\n    is skipped, and once listeners are removed. A listener without\n    a target is executed on the passed object. If an array of actions\n    is not passed, the actions stored on the passed object are invoked.\n  \n    @method sendEvent\n    @static\n    @for @ember/object/events\n    @param obj\n    @param {String} eventName\n    @param {Array} params Optional parameters for each listener.\n    @param {Array} actions Optional array of actions (listeners).\n    @param {Meta}  meta Optional meta to lookup listeners\n    @return true\n    @public\n  */\n  function sendEvent(obj, eventName, params, actions, _meta) {\n    if (actions === undefined) {\n      var meta$$1 = _meta === undefined ? exports.peekMeta(obj) : _meta;\n      actions = typeof meta$$1 === 'object' && meta$$1 !== null && meta$$1.matchingListeners(eventName);\n    }\n\n    if (actions === undefined || actions.length === 0) {\n      return false;\n    }\n\n    for (var i = actions.length - 3; i >= 0; i -= 3) {\n      // looping in reverse for once listeners\n      var target = actions[i];\n      var method = actions[i + 1];\n      var flags = actions[i + 2];\n\n      if (!method) {\n        continue;\n      }\n      if (flags & SUSPENDED) {\n        continue;\n      }\n      if (flags & ONCE) {\n        removeListener(obj, eventName, target, method);\n      }\n      if (!target) {\n        target = obj;\n      }\n      if ('string' === typeof method) {\n        if (params) {\n          emberUtils.applyStr(target, method, params);\n        } else {\n          target[method]();\n        }\n      } else {\n        if (params) {\n          method.apply(target, params);\n        } else {\n          method.call(target);\n        }\n      }\n    }\n    return true;\n  }\n\n  /**\n    @private\n    @method hasListeners\n    @static\n    @for @ember/object/events\n    @param obj\n    @param {String} eventName\n  */\n  function hasListeners(obj, eventName) {\n    var meta$$1 = exports.peekMeta(obj);\n    if (meta$$1 === undefined) {\n      return false;\n    }\n    var matched = meta$$1.matchingListeners(eventName);\n    return matched !== undefined && matched.length > 0;\n  }\n\n  /**\n    @private\n    @method listenersFor\n    @static\n    @for @ember/object/events\n    @param obj\n    @param {String} eventName\n  */\n  function listenersFor(obj, eventName) {\n    var ret = [];\n    var meta$$1 = exports.peekMeta(obj);\n    var actions = meta$$1 !== undefined ? meta$$1.matchingListeners(eventName) : undefined;\n\n    if (actions === undefined) {\n      return ret;\n    }\n\n    for (var i = 0; i < actions.length; i += 3) {\n      var target = actions[i];\n      var method = actions[i + 1];\n      ret.push([target, method]);\n    }\n\n    return ret;\n  }\n\n  /**\n    Define a property as a function that should be executed when\n    a specified event or events are triggered.\n  \n  \n    ``` javascript\n    import EmberObject from '@ember/object';\n    import { on } from '@ember/object/evented';\n    import { sendEvent } from '@ember/object/events';\n  \n    let Job = EmberObject.extend({\n      logCompleted: on('completed', function() {\n        console.log('Job completed!');\n      })\n    });\n  \n    let job = Job.create();\n  \n    sendEvent(job, 'completed'); // Logs 'Job completed!'\n   ```\n  \n    @method on\n    @static\n    @for @ember/object/evented\n    @param {String} eventNames*\n    @param {Function} func\n    @return func\n    @public\n  */\n  function on() {\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var func = args.pop();\n    var events = args;\n\n    true && !(typeof func === 'function') && emberDebug.assert('on expects function as last argument', typeof func === 'function');\n    true && !(events.length > 0 && events.every(function (p) {\n      return typeof p === 'string' && p.length;\n    })) && emberDebug.assert('on called without valid event names', events.length > 0 && events.every(function (p) {\n      return typeof p === 'string' && p.length;\n    }));\n\n    func.__ember_listens__ = events;\n    return func;\n  }\n\n  var hasViews = function () {\n    return false;\n  };\n\n  function setHasViews(fn) {\n    hasViews = fn;\n  }\n\n  function makeTag() {\n    return new _glimmer_reference.DirtyableTag();\n  }\n\n  function tagForProperty(object, propertyKey, _meta) {\n    if (typeof object !== 'object' || object === null) {\n      return _glimmer_reference.CONSTANT_TAG;\n    }\n\n    var meta$$1 = _meta === undefined ? meta(object) : _meta;\n    if (meta$$1.isProxy()) {\n      return tagFor(object, meta$$1);\n    }\n\n    var tags = meta$$1.writableTags();\n    var tag = tags[propertyKey];\n    if (tag) {\n      return tag;\n    }\n\n    return tags[propertyKey] = makeTag();\n  }\n\n  function tagFor(object, _meta) {\n    if (typeof object === 'object' && object !== null) {\n      var meta$$1 = _meta === undefined ? meta(object) : _meta;\n      return meta$$1.writableTag(makeTag);\n    } else {\n      return _glimmer_reference.CONSTANT_TAG;\n    }\n  }\n\n  function markObjectAsDirty(meta$$1, propertyKey) {\n    var objectTag = meta$$1.readableTag();\n\n    if (objectTag !== undefined) {\n      objectTag.dirty();\n    }\n\n    var tags = meta$$1.readableTags();\n    var propertyTag = tags !== undefined ? tags[propertyKey] : undefined;\n\n    if (propertyTag !== undefined) {\n      propertyTag.dirty();\n    }\n\n    if (propertyKey === 'content' && meta$$1.isProxy()) {\n      objectTag.contentDidChange();\n    }\n\n    if (objectTag !== undefined || propertyTag !== undefined) {\n      ensureRunloop();\n    }\n  }\n\n  var backburner = void 0;\n  function ensureRunloop() {\n    if (backburner === undefined) {\n      backburner = require('ember-metal').run.backburner;\n    }\n\n    if (hasViews()) {\n      backburner.ensureInstance();\n    }\n  }\n\n  /*\n    this.observerSet = {\n      [senderGuid]: { // variable name: `keySet`\n        [keyName]: listIndex\n      }\n    },\n    this.observers = [\n      {\n        sender: obj,\n        keyName: keyName,\n        eventName: eventName,\n        listeners: [\n          [target, method, flags]\n        ]\n      },\n      ...\n    ]\n  */\n\n  var ObserverSet = function () {\n    function ObserverSet() {\n      emberBabel.classCallCheck(this, ObserverSet);\n\n      this.clear();\n    }\n\n    ObserverSet.prototype.add = function add(sender, keyName, eventName) {\n      var observerSet = this.observerSet;\n      var observers = this.observers;\n      var senderGuid = emberUtils.guidFor(sender);\n      var keySet = observerSet[senderGuid];\n\n      if (keySet === undefined) {\n        observerSet[senderGuid] = keySet = {};\n      }\n\n      var index = keySet[keyName];\n      if (index === undefined) {\n        index = observers.push({\n          sender: sender,\n          keyName: keyName,\n          eventName: eventName,\n          listeners: []\n        }) - 1;\n        keySet[keyName] = index;\n      }\n      return observers[index].listeners;\n    };\n\n    ObserverSet.prototype.flush = function flush() {\n      var observers = this.observers;\n      var observer = void 0,\n          sender = void 0;\n      this.clear();\n      for (var i = 0; i < observers.length; ++i) {\n        observer = observers[i];\n        sender = observer.sender;\n        if (sender.isDestroying || sender.isDestroyed) {\n          continue;\n        }\n        sendEvent(sender, observer.eventName, [sender, observer.keyName], observer.listeners);\n      }\n    };\n\n    ObserverSet.prototype.clear = function clear() {\n      this.observerSet = {};\n      this.observers = [];\n    };\n\n    return ObserverSet;\n  }();\n\n  /**\n   @module ember\n  */\n  var id = 0;\n\n  // Returns whether Type(value) is Object according to the terminology in the spec\n  function isObject$1(value) {\n    return typeof value === 'object' && value !== null || typeof value === 'function';\n  }\n\n  /*\n   * @class Ember.WeakMap\n   * @public\n   * @category ember-metal-weakmap\n   *\n   * A partial polyfill for [WeakMap](http://www.ecma-international.org/ecma-262/6.0/#sec-weakmap-objects).\n   *\n   * There is a small but important caveat. This implementation assumes that the\n   * weak map will live longer (in the sense of garbage collection) than all of its\n   * keys, otherwise it is possible to leak the values stored in the weak map. In\n   * practice, most use cases satisfy this limitation which is why it is included\n   * in ember-metal.\n   */\n  var WeakMapPolyfill = function () {\n    function WeakMapPolyfill(iterable) {\n      emberBabel.classCallCheck(this, WeakMapPolyfill);\n\n      this._id = emberUtils.GUID_KEY + id++;\n\n      if (iterable === null || iterable === undefined) {\n        return;\n      } else if (Array.isArray(iterable)) {\n        for (var i = 0; i < iterable.length; i++) {\n          var _iterable$i = iterable[i],\n              key = _iterable$i[0],\n              value = _iterable$i[1];\n\n          this.set(key, value);\n        }\n      } else {\n        throw new TypeError('The weak map constructor polyfill only supports an array argument');\n      }\n    }\n\n    /*\n     * @method get\n     * @param key {Object | Function}\n     * @return {Any} stored value\n     */\n\n    WeakMapPolyfill.prototype.get = function get(obj) {\n      if (!isObject$1(obj)) {\n        return undefined;\n      }\n\n      var meta$$1 = exports.peekMeta(obj);\n      if (meta$$1 !== undefined) {\n        var map = meta$$1.readableWeak();\n        if (map !== undefined) {\n          var val = map[this._id];\n          if (val === UNDEFINED) {\n            return undefined;\n          }\n          return val;\n        }\n      }\n    };\n\n    /*\n     * @method set\n     * @param key {Object | Function}\n     * @param value {Any}\n     * @return {WeakMap} the weak map\n     */\n\n    WeakMapPolyfill.prototype.set = function set(obj, value) {\n      if (!isObject$1(obj)) {\n        throw new TypeError('Invalid value used as weak map key');\n      }\n\n      if (value === undefined) {\n        value = UNDEFINED;\n      }\n\n      meta(obj).writableWeak()[this._id] = value;\n\n      return this;\n    };\n\n    /*\n     * @method has\n     * @param key {Object | Function}\n     * @return {boolean} if the key exists\n     */\n\n    WeakMapPolyfill.prototype.has = function has(obj) {\n      if (!isObject$1(obj)) {\n        return false;\n      }\n\n      var meta$$1 = exports.peekMeta(obj);\n      if (meta$$1 !== undefined) {\n        var map = meta$$1.readableWeak();\n        if (map !== undefined) {\n          return map[this._id] !== undefined;\n        }\n      }\n\n      return false;\n    };\n\n    /*\n     * @method delete\n     * @param key {Object | Function}\n     * @return {boolean} if the key was deleted\n     */\n\n    WeakMapPolyfill.prototype.delete = function _delete(obj) {\n      if (this.has(obj)) {\n        delete exports.peekMeta(obj).writableWeak()[this._id];\n        return true;\n      } else {\n        return false;\n      }\n    };\n\n    /*\n     * @method toString\n     * @return {String}\n     */\n\n    WeakMapPolyfill.prototype.toString = function toString$$1() {\n      return '[object WeakMap]';\n    };\n\n    return WeakMapPolyfill;\n  }();\n\n  var WeakMap$1 = emberUtils.HAS_NATIVE_WEAKMAP ? WeakMap : WeakMapPolyfill;\n\n  exports.runInTransaction = void 0;\n  exports.didRender = void 0;\n  exports.assertNotRendered = void 0;\n\n  // detect-backtracking-rerender by default is debug build only\n  // detect-glimmer-allow-backtracking-rerender can be enabled in custom builds\n  if (ember_features.EMBER_GLIMMER_DETECT_BACKTRACKING_RERENDER || ember_features.EMBER_GLIMMER_ALLOW_BACKTRACKING_RERENDER) {\n\n    // there are 4 states\n\n    // NATIVE WEAKMAP AND DEBUG\n    // tracks lastRef and lastRenderedIn per rendered object and key during a transaction\n    // release everything via normal weakmap semantics by just derefencing the weakmap\n\n    // NATIVE WEAKMAP AND RELEASE\n    // tracks transactionId per rendered object and key during a transaction\n    // release everything via normal weakmap semantics by just derefencing the weakmap\n\n    // WEAKMAP POLYFILL AND DEBUG\n    // tracks lastRef and lastRenderedIn per rendered object and key during a transaction\n    // since lastRef retains a lot of app state (will have a ref to the Container)\n    // if the object rendered is retained (like a immutable POJO in module state)\n    // during acceptance tests this adds up and obfuscates finding other leaks.\n\n    // WEAKMAP POLYFILL AND RELEASE\n    // tracks transactionId per rendered object and key during a transaction\n    // leaks it because small and likely not worth tracking it since it will only\n    // be leaked if the object is retained\n\n    var TransactionRunner = function () {\n      function TransactionRunner() {\n        emberBabel.classCallCheck(this, TransactionRunner);\n\n        this.transactionId = 0;\n        this.inTransaction = false;\n        this.shouldReflush = false;\n        this.weakMap = new WeakMap$1();\n        {\n          // track templates\n          this.debugStack = undefined;\n\n          if (!emberUtils.HAS_NATIVE_WEAKMAP) {\n            // DEBUG AND POLYFILL\n            // needs obj tracking\n            this.objs = [];\n          }\n        }\n      }\n\n      TransactionRunner.prototype.runInTransaction = function runInTransaction(context$$1, methodName) {\n        this.before(context$$1);\n        try {\n          context$$1[methodName]();\n        } finally {\n          this.after();\n        }\n        return this.shouldReflush;\n      };\n\n      TransactionRunner.prototype.didRender = function didRender(object, key, reference) {\n        if (!this.inTransaction) {\n          return;\n        }\n        {\n          this.setKey(object, key, {\n            lastRef: reference,\n            lastRenderedIn: this.debugStack.peek()\n          });\n        }\n      };\n\n      TransactionRunner.prototype.assertNotRendered = function assertNotRendered(object, key) {\n        if (!this.inTransaction) {\n          return;\n        }\n        if (this.hasRendered(object, key)) {\n          {\n            var _getKey = this.getKey(object, key),\n                lastRef = _getKey.lastRef,\n                lastRenderedIn = _getKey.lastRenderedIn;\n\n            var currentlyIn = this.debugStack.peek();\n\n            var parts = [];\n            var label = void 0;\n\n            if (lastRef !== undefined) {\n              while (lastRef && lastRef._propertyKey) {\n                parts.unshift(lastRef._propertyKey);\n                lastRef = lastRef._parentReference;\n              }\n\n              label = parts.join('.');\n            } else {\n              label = 'the same value';\n            }\n\n            var message = 'You modified \"' + label + '\" twice on ' + object + ' in a single render. It was rendered in ' + lastRenderedIn + ' and modified in ' + currentlyIn + '. This was unreliable and slow in Ember 1.x and';\n\n            if (ember_features.EMBER_GLIMMER_ALLOW_BACKTRACKING_RERENDER) {\n              true && !false && emberDebug.deprecate(message + ' will be removed in Ember 3.0.', false, { id: 'ember-views.render-double-modify', until: '3.0.0' });\n            } else {\n              true && !false && emberDebug.assert(message + ' is no longer supported. See https://github.com/emberjs/ember.js/issues/13948 for more details.', false);\n            }\n          }\n\n          this.shouldReflush = true;\n        }\n      };\n\n      TransactionRunner.prototype.hasRendered = function hasRendered(object, key) {\n        if (!this.inTransaction) {\n          return false;\n        }\n        {\n          return this.getKey(object, key) !== undefined;\n        }\n        return this.getKey(object, key) === this.transactionId;\n      };\n\n      TransactionRunner.prototype.before = function before(context$$1) {\n        this.inTransaction = true;\n        this.shouldReflush = false;\n        {\n          this.debugStack = context$$1.env.debugStack;\n        }\n      };\n\n      TransactionRunner.prototype.after = function after() {\n        this.transactionId++;\n        this.inTransaction = false;\n        {\n          this.debugStack = undefined;\n        }\n        this.clearObjectMap();\n      };\n\n      TransactionRunner.prototype.createMap = function createMap(object) {\n        var map = Object.create(null);\n        this.weakMap.set(object, map);\n        if (true && !emberUtils.HAS_NATIVE_WEAKMAP) {\n          // POLYFILL AND DEBUG\n          // requires tracking objects\n          this.objs.push(object);\n        }\n        return map;\n      };\n\n      TransactionRunner.prototype.getOrCreateMap = function getOrCreateMap(object) {\n        var map = this.weakMap.get(object);\n        if (map === undefined) {\n          map = this.createMap(object);\n        }\n        return map;\n      };\n\n      TransactionRunner.prototype.setKey = function setKey(object, key, value) {\n        var map = this.getOrCreateMap(object);\n        map[key] = value;\n      };\n\n      TransactionRunner.prototype.getKey = function getKey(object, key) {\n        var map = this.weakMap.get(object);\n        if (map !== undefined) {\n          return map[key];\n        }\n      };\n\n      TransactionRunner.prototype.clearObjectMap = function clearObjectMap() {\n        if (emberUtils.HAS_NATIVE_WEAKMAP) {\n          // NATIVE AND (DEBUG OR RELEASE)\n          // if we have a real native weakmap\n          // releasing the ref will allow the values to be GCed\n          this.weakMap = new WeakMap$1();\n        } else {\n          // POLYFILL AND DEBUG\n          // with a polyfill the weakmap keys must be cleared since\n          // they have the last reference, acceptance tests will leak\n          // the container if you render a immutable object retained\n          // in module scope.\n          var objs = this.objs,\n              weakMap = this.weakMap;\n\n          this.objs = [];\n          for (var i = 0; i < objs.length; i++) {\n            weakMap.delete(objs[i]);\n          }\n        }\n        // POLYFILL AND RELEASE\n        // we leak the key map if the object is retained but this is\n        // a POJO of keys to transaction ids\n      };\n\n      return TransactionRunner;\n    }();\n\n    var runner = new TransactionRunner();\n\n    exports.runInTransaction = runner.runInTransaction.bind(runner);\n    exports.didRender = runner.didRender.bind(runner);\n    exports.assertNotRendered = runner.assertNotRendered.bind(runner);\n  } else {\n    // in production do nothing to detect reflushes\n    exports.runInTransaction = function (context$$1, methodName) {\n      context$$1[methodName]();\n      return false;\n    };\n  }\n\n  /**\n   @module ember\n   @private\n   */\n\n  var PROPERTY_DID_CHANGE = emberUtils.symbol('PROPERTY_DID_CHANGE');\n\n  var beforeObserverSet = new ObserverSet();\n  var observerSet = new ObserverSet();\n  var deferred = 0;\n\n  // ..........................................................\n  // PROPERTY CHANGES\n  //\n\n  /**\n    This function is called just before an object property is about to change.\n    It will notify any before observers and prepare caches among other things.\n  \n    Normally you will not need to call this method directly but if for some\n    reason you can't directly watch a property you can invoke this method\n    manually along with `Ember.propertyDidChange()` which you should call just\n    after the property value changes.\n  \n    @method propertyWillChange\n    @for Ember\n    @param {Object} obj The object with the property that will change\n    @param {String} keyName The property key (or path) that will change.\n    @return {void}\n    @private\n  */\n  function propertyWillChange(obj, keyName, _meta) {\n    var meta$$1 = _meta === undefined ? exports.peekMeta(obj) : _meta;\n    if (meta$$1 !== undefined && !meta$$1.isInitialized(obj)) {\n      return;\n    }\n\n    var watching = meta$$1 !== undefined && meta$$1.peekWatching(keyName) > 0;\n    var possibleDesc = obj[keyName];\n    var isDescriptor = possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor;\n\n    if (isDescriptor && possibleDesc.willChange) {\n      possibleDesc.willChange(obj, keyName);\n    }\n\n    if (watching) {\n      dependentKeysWillChange(obj, keyName, meta$$1);\n      chainsWillChange(obj, keyName, meta$$1);\n      notifyBeforeObservers(obj, keyName, meta$$1);\n    }\n  }\n\n  /**\n    This function is called just after an object property has changed.\n    It will notify any observers and clear caches among other things.\n  \n    Normally you will not need to call this method directly but if for some\n    reason you can't directly watch a property you can invoke this method\n    manually along with `Ember.propertyWillChange()` which you should call just\n    before the property value changes.\n  \n    @method propertyDidChange\n    @for Ember\n    @param {Object} obj The object with the property that will change\n    @param {String} keyName The property key (or path) that will change.\n    @param {Meta} meta The objects meta.\n    @return {void}\n    @private\n  */\n  function propertyDidChange(obj, keyName, _meta) {\n    var meta$$1 = _meta === undefined ? exports.peekMeta(obj) : _meta;\n    var hasMeta = meta$$1 !== undefined;\n\n    if (hasMeta && !meta$$1.isInitialized(obj)) {\n      return;\n    }\n\n    var possibleDesc = obj[keyName];\n    var isDescriptor = possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor;\n\n    // shouldn't this mean that we're watching this key?\n    if (isDescriptor && possibleDesc.didChange) {\n      possibleDesc.didChange(obj, keyName);\n    }\n\n    if (hasMeta && meta$$1.peekWatching(keyName) > 0) {\n      dependentKeysDidChange(obj, keyName, meta$$1);\n      chainsDidChange(obj, keyName, meta$$1);\n      notifyObservers(obj, keyName, meta$$1);\n    }\n\n    if (obj[PROPERTY_DID_CHANGE]) {\n      obj[PROPERTY_DID_CHANGE](keyName);\n    }\n\n    if (hasMeta) {\n      if (meta$$1.isSourceDestroying()) {\n        return;\n      }\n      markObjectAsDirty(meta$$1, keyName);\n    }\n\n    if (ember_features.EMBER_GLIMMER_DETECT_BACKTRACKING_RERENDER || ember_features.EMBER_GLIMMER_ALLOW_BACKTRACKING_RERENDER) {\n      exports.assertNotRendered(obj, keyName, meta$$1);\n    }\n  }\n\n  var WILL_SEEN = void 0;\n  var DID_SEEN = void 0;\n  // called whenever a property is about to change to clear the cache of any dependent keys (and notify those properties of changes, etc...)\n  function dependentKeysWillChange(obj, depKey, meta$$1) {\n    if (meta$$1.isSourceDestroying() || !meta$$1.hasDeps(depKey)) {\n      return;\n    }\n    var seen = WILL_SEEN;\n    var top = !seen;\n\n    if (top) {\n      seen = WILL_SEEN = {};\n    }\n\n    iterDeps(propertyWillChange, obj, depKey, seen, meta$$1);\n\n    if (top) {\n      WILL_SEEN = null;\n    }\n  }\n\n  // called whenever a property has just changed to update dependent keys\n  function dependentKeysDidChange(obj, depKey, meta$$1) {\n    if (meta$$1.isSourceDestroying() || !meta$$1.hasDeps(depKey)) {\n      return;\n    }\n    var seen = DID_SEEN;\n    var top = !seen;\n\n    if (top) {\n      seen = DID_SEEN = {};\n    }\n\n    iterDeps(propertyDidChange, obj, depKey, seen, meta$$1);\n\n    if (top) {\n      DID_SEEN = null;\n    }\n  }\n\n  function iterDeps(method, obj, depKey, seen, meta$$1) {\n    var possibleDesc = void 0,\n        isDescriptor = void 0;\n    var guid = emberUtils.guidFor(obj);\n    var current = seen[guid];\n\n    if (!current) {\n      current = seen[guid] = {};\n    }\n\n    if (current[depKey]) {\n      return;\n    }\n\n    current[depKey] = true;\n\n    meta$$1.forEachInDeps(depKey, function (key, value) {\n      if (!value) {\n        return;\n      }\n\n      possibleDesc = obj[key];\n      isDescriptor = possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor;\n\n      if (isDescriptor && possibleDesc._suspended === obj) {\n        return;\n      }\n\n      method(obj, key, meta$$1);\n    });\n  }\n\n  function chainsWillChange(obj, keyName, meta$$1) {\n    var chainWatchers = meta$$1.readableChainWatchers();\n    if (chainWatchers !== undefined) {\n      chainWatchers.notify(keyName, false, propertyWillChange);\n    }\n  }\n\n  function chainsDidChange(obj, keyName, meta$$1) {\n    var chainWatchers = meta$$1.readableChainWatchers();\n    if (chainWatchers !== undefined) {\n      chainWatchers.notify(keyName, true, propertyDidChange);\n    }\n  }\n\n  function overrideChains(obj, keyName, meta$$1) {\n    var chainWatchers = meta$$1.readableChainWatchers();\n    if (chainWatchers !== undefined) {\n      chainWatchers.revalidate(keyName);\n    }\n  }\n\n  /**\n    @method beginPropertyChanges\n    @chainable\n    @private\n  */\n  function beginPropertyChanges() {\n    deferred++;\n  }\n\n  /**\n    @method endPropertyChanges\n    @private\n  */\n  function endPropertyChanges() {\n    deferred--;\n    if (deferred <= 0) {\n      beforeObserverSet.clear();\n      observerSet.flush();\n    }\n  }\n\n  /**\n    Make a series of property changes together in an\n    exception-safe way.\n  \n    ```javascript\n    Ember.changeProperties(function() {\n      obj1.set('foo', mayBlowUpWhenSet);\n      obj2.set('bar', baz);\n    });\n    ```\n  \n    @method changeProperties\n    @param {Function} callback\n    @param [binding]\n    @private\n  */\n  function changeProperties(callback, binding) {\n    beginPropertyChanges();\n    try {\n      callback.call(binding);\n    } finally {\n      endPropertyChanges();\n    }\n  }\n\n  function indexOf(array, target, method) {\n    var index = -1;\n    // hashes are added to the end of the event array\n    // so it makes sense to start searching at the end\n    // of the array and search in reverse\n    for (var i = array.length - 3; i >= 0; i -= 3) {\n      if (target === array[i] && method === array[i + 1]) {\n        index = i;\n        break;\n      }\n    }\n    return index;\n  }\n\n  function accumulateListeners(obj, eventName, otherActions, meta$$1) {\n    var actions = meta$$1.matchingListeners(eventName);\n    if (actions === undefined) {\n      return;\n    }\n    var newActions = [];\n\n    for (var i = actions.length - 3; i >= 0; i -= 3) {\n      var target = actions[i];\n      var method = actions[i + 1];\n      var flags = actions[i + 2];\n      var actionIndex = indexOf(otherActions, target, method);\n\n      if (actionIndex === -1) {\n        otherActions.push(target, method, flags);\n        newActions.push(target, method, flags);\n      }\n    }\n\n    return newActions;\n  }\n\n  function notifyBeforeObservers(obj, keyName, meta$$1) {\n    if (meta$$1.isSourceDestroying()) {\n      return;\n    }\n\n    var eventName = keyName + ':before';\n    var listeners = void 0,\n        added = void 0;\n    if (deferred > 0) {\n      listeners = beforeObserverSet.add(obj, keyName, eventName);\n      added = accumulateListeners(obj, eventName, listeners, meta$$1);\n    }\n    sendEvent(obj, eventName, [obj, keyName], added);\n  }\n\n  function notifyObservers(obj, keyName, meta$$1) {\n    if (meta$$1.isSourceDestroying()) {\n      return;\n    }\n\n    var eventName = keyName + ':change';\n    var listeners = void 0;\n    if (deferred > 0) {\n      listeners = observerSet.add(obj, keyName, eventName);\n      accumulateListeners(obj, eventName, listeners, meta$$1);\n    } else {\n      sendEvent(obj, eventName, [obj, keyName]);\n    }\n  }\n\n  /**\n  @module @ember/object\n  */\n\n  // ..........................................................\n  // DESCRIPTOR\n  //\n\n  /**\n    Objects of this type can implement an interface to respond to requests to\n    get and set. The default implementation handles simple properties.\n  \n    @class Descriptor\n    @private\n  */\n  function Descriptor() {\n    this.isDescriptor = true;\n  }\n\n  var REDEFINE_SUPPORTED = function () {\n    // https://github.com/spalger/kibana/commit/b7e35e6737df585585332857a4c397dc206e7ff9\n    var a = Object.create(Object.prototype, {\n      prop: {\n        configurable: true,\n        value: 1\n      }\n    });\n\n    Object.defineProperty(a, 'prop', {\n      configurable: true,\n      value: 2\n    });\n\n    return a.prop === 2;\n  }();\n  // ..........................................................\n  // DEFINING PROPERTIES API\n  //\n\n  function MANDATORY_SETTER_FUNCTION(name) {\n    function SETTER_FUNCTION(value) {\n      var m = exports.peekMeta(this);\n      if (!m.isInitialized(this)) {\n        m.writeValues(name, value);\n      } else {\n        true && !false && emberDebug.assert('You must use set() to set the `' + name + '` property (of ' + this + ') to `' + value + '`.', false);\n      }\n    }\n\n    SETTER_FUNCTION.isMandatorySetter = true;\n    return SETTER_FUNCTION;\n  }\n\n  function DEFAULT_GETTER_FUNCTION(name) {\n    return function GETTER_FUNCTION() {\n      var meta$$1 = exports.peekMeta(this);\n      if (meta$$1 !== undefined) {\n        return meta$$1.peekValues(name);\n      }\n    };\n  }\n\n  function INHERITING_GETTER_FUNCTION(name) {\n    function IGETTER_FUNCTION() {\n      var meta$$1 = exports.peekMeta(this);\n      var val = void 0;\n      if (meta$$1 !== undefined) {\n        val = meta$$1.readInheritedValue('values', name);\n      }\n\n      if (val === UNDEFINED) {\n        var proto = Object.getPrototypeOf(this);\n        return proto && proto[name];\n      } else {\n        return val;\n      }\n    }\n\n    IGETTER_FUNCTION.isInheritingGetter = true;\n    return IGETTER_FUNCTION;\n  }\n\n  /**\n    NOTE: This is a low-level method used by other parts of the API. You almost\n    never want to call this method directly. Instead you should use\n    `mixin()` to define new properties.\n  \n    Defines a property on an object. This method works much like the ES5\n    `Object.defineProperty()` method except that it can also accept computed\n    properties and other special descriptors.\n  \n    Normally this method takes only three parameters. However if you pass an\n    instance of `Descriptor` as the third param then you can pass an\n    optional value as the fourth parameter. This is often more efficient than\n    creating new descriptor hashes for each property.\n  \n    ## Examples\n  \n    ```javascript\n    import { defineProperty, computed } from '@ember/object';\n  \n    // ES5 compatible mode\n    defineProperty(contact, 'firstName', {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: 'Charles'\n    });\n  \n    // define a simple property\n    defineProperty(contact, 'lastName', undefined, 'Jolley');\n  \n    // define a computed property\n    defineProperty(contact, 'fullName', computed('firstName', 'lastName', function() {\n      return this.firstName+' '+this.lastName;\n    }));\n    ```\n  \n    @private\n    @method defineProperty\n    @for @ember/object\n    @param {Object} obj the object to define this property on. This may be a prototype.\n    @param {String} keyName the name of the property\n    @param {Descriptor} [desc] an instance of `Descriptor` (typically a\n      computed property) or an ES5 descriptor.\n      You must provide this or `data` but not both.\n    @param {*} [data] something other than a descriptor, that will\n      become the explicit value of this property.\n  */\n  function defineProperty(obj, keyName, desc, data, meta$$1) {\n    if (meta$$1 === undefined) {\n      meta$$1 = meta(obj);\n    }\n\n    var watchEntry = meta$$1.peekWatching(keyName);\n    var watching = watchEntry !== undefined && watchEntry > 0;\n    var possibleDesc = obj[keyName];\n    var isDescriptor = possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor;\n\n    if (isDescriptor) {\n      possibleDesc.teardown(obj, keyName, meta$$1);\n    }\n\n    var value = void 0;\n    if (desc instanceof Descriptor) {\n      value = desc;\n      if (ember_features.MANDATORY_SETTER) {\n        if (watching) {\n          Object.defineProperty(obj, keyName, {\n            configurable: true,\n            enumerable: true,\n            writable: true,\n            value: value\n          });\n        } else {\n          obj[keyName] = value;\n        }\n      } else {\n        obj[keyName] = value;\n      }\n\n      didDefineComputedProperty(obj.constructor);\n\n      if (typeof desc.setup === 'function') {\n        desc.setup(obj, keyName);\n      }\n    } else if (desc === undefined || desc === null) {\n      value = data;\n\n      if (ember_features.MANDATORY_SETTER) {\n        if (watching) {\n          meta$$1.writeValues(keyName, data);\n\n          var defaultDescriptor = {\n            configurable: true,\n            enumerable: true,\n            set: MANDATORY_SETTER_FUNCTION(keyName),\n            get: DEFAULT_GETTER_FUNCTION(keyName)\n          };\n\n          if (REDEFINE_SUPPORTED) {\n            Object.defineProperty(obj, keyName, defaultDescriptor);\n          } else {\n            handleBrokenPhantomDefineProperty(obj, keyName, defaultDescriptor);\n          }\n        } else {\n          obj[keyName] = data;\n        }\n      } else {\n        obj[keyName] = data;\n      }\n    } else {\n      value = desc;\n\n      // fallback to ES5\n      Object.defineProperty(obj, keyName, desc);\n    }\n\n    // if key is being watched, override chains that\n    // were initialized with the prototype\n    if (watching) {\n      overrideChains(obj, keyName, meta$$1);\n    }\n\n    // The `value` passed to the `didDefineProperty` hook is\n    // either the descriptor or data, whichever was passed.\n    if (typeof obj.didDefineProperty === 'function') {\n      obj.didDefineProperty(obj, keyName, value);\n    }\n\n    return this;\n  }\n\n  var hasCachedComputedProperties = false;\n  function _hasCachedComputedProperties() {\n    hasCachedComputedProperties = true;\n  }\n\n  function didDefineComputedProperty(constructor) {\n    if (hasCachedComputedProperties === false) {\n      return;\n    }\n    var cache = meta(constructor).readableCache();\n\n    if (cache && cache._computedProperties !== undefined) {\n      cache._computedProperties = undefined;\n    }\n  }\n\n  function handleBrokenPhantomDefineProperty(obj, keyName, desc) {\n    // https://github.com/ariya/phantomjs/issues/11856\n    Object.defineProperty(obj, keyName, { configurable: true, writable: true, value: 'iCry' });\n    Object.defineProperty(obj, keyName, desc);\n  }\n\n  var handleMandatorySetter = void 0;\n\n  function watchKey(obj, keyName, _meta) {\n    if (typeof obj !== 'object' || obj === null) {\n      return;\n    }\n\n    var meta$$1 = _meta === undefined ? meta(obj) : _meta;\n    var count = meta$$1.peekWatching(keyName) || 0;\n    meta$$1.writeWatching(keyName, count + 1);\n\n    if (count === 0) {\n      // activate watching first time\n      var possibleDesc = obj[keyName];\n      var isDescriptor = possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor;\n      if (isDescriptor && possibleDesc.willWatch) {\n        possibleDesc.willWatch(obj, keyName, meta$$1);\n      }\n\n      if (typeof obj.willWatchProperty === 'function') {\n        obj.willWatchProperty(keyName);\n      }\n\n      if (ember_features.MANDATORY_SETTER) {\n        // NOTE: this is dropped for prod + minified builds\n        handleMandatorySetter(meta$$1, obj, keyName);\n      }\n    }\n  }\n\n  if (ember_features.MANDATORY_SETTER) {\n    var _hasOwnProperty = function (obj, key) {\n      return Object.prototype.hasOwnProperty.call(obj, key);\n    };\n    var _propertyIsEnumerable = function (obj, key) {\n      return Object.prototype.propertyIsEnumerable.call(obj, key);\n    };\n\n    // Future traveler, although this code looks scary. It merely exists in\n    // development to aid in development asertions. Production builds of\n    // ember strip this entire block out\n    handleMandatorySetter = function handleMandatorySetter(m, obj, keyName) {\n      var descriptor = emberUtils.lookupDescriptor(obj, keyName);\n      var hasDescriptor = descriptor !== null;\n      var configurable = hasDescriptor ? descriptor.configurable : true;\n      var isWritable = hasDescriptor ? descriptor.writable : true;\n      var hasValue = hasDescriptor ? 'value' in descriptor : true;\n      var possibleDesc = hasDescriptor && descriptor.value;\n      var isDescriptor = possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor;\n\n      if (isDescriptor) {\n        return;\n      }\n\n      // this x in Y deopts, so keeping it in this function is better;\n      if (configurable && isWritable && hasValue && keyName in obj) {\n        var desc = {\n          configurable: true,\n          set: MANDATORY_SETTER_FUNCTION(keyName),\n          enumerable: _propertyIsEnumerable(obj, keyName),\n          get: undefined\n        };\n\n        if (_hasOwnProperty(obj, keyName)) {\n          m.writeValues(keyName, obj[keyName]);\n          desc.get = DEFAULT_GETTER_FUNCTION(keyName);\n        } else {\n          desc.get = INHERITING_GETTER_FUNCTION(keyName);\n        }\n\n        Object.defineProperty(obj, keyName, desc);\n      }\n    };\n  }\n\n  function unwatchKey(obj, keyName, _meta) {\n    if (typeof obj !== 'object' || obj === null) {\n      return;\n    }\n    var meta$$1 = _meta === undefined ? exports.peekMeta(obj) : _meta;\n\n    // do nothing of this object has already been destroyed\n    if (meta$$1 === undefined || meta$$1.isSourceDestroyed()) {\n      return;\n    }\n\n    var count = meta$$1.peekWatching(keyName);\n    if (count === 1) {\n      meta$$1.writeWatching(keyName, 0);\n\n      var possibleDesc = obj[keyName];\n      var isDescriptor = possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor;\n\n      if (isDescriptor && possibleDesc.didUnwatch) {\n        possibleDesc.didUnwatch(obj, keyName, meta$$1);\n      }\n\n      if (typeof obj.didUnwatchProperty === 'function') {\n        obj.didUnwatchProperty(keyName);\n      }\n\n      if (ember_features.MANDATORY_SETTER) {\n        // It is true, the following code looks quite WAT. But have no fear, It\n        // exists purely to improve development ergonomics and is removed from\n        // ember.min.js and ember.prod.js builds.\n        //\n        // Some further context: Once a property is watched by ember, bypassing `set`\n        // for mutation, will bypass observation. This code exists to assert when\n        // that occurs, and attempt to provide more helpful feedback. The alternative\n        // is tricky to debug partially observable properties.\n        if (!isDescriptor && keyName in obj) {\n          var maybeMandatoryDescriptor = emberUtils.lookupDescriptor(obj, keyName);\n\n          if (maybeMandatoryDescriptor.set && maybeMandatoryDescriptor.set.isMandatorySetter) {\n            if (maybeMandatoryDescriptor.get && maybeMandatoryDescriptor.get.isInheritingGetter) {\n              var possibleValue = meta$$1.readInheritedValue('values', keyName);\n              if (possibleValue === UNDEFINED) {\n                delete obj[keyName];\n                return;\n              }\n            }\n\n            Object.defineProperty(obj, keyName, {\n              configurable: true,\n              enumerable: Object.prototype.propertyIsEnumerable.call(obj, keyName),\n              writable: true,\n              value: meta$$1.peekValues(keyName)\n            });\n            meta$$1.deleteFromValues(keyName);\n          }\n        }\n      }\n    } else if (count > 1) {\n      meta$$1.writeWatching(keyName, count - 1);\n    }\n  }\n\n  function makeChainNode(obj) {\n    return new ChainNode(null, null, obj);\n  }\n\n  function watchPath(obj, keyPath, meta$$1) {\n    if (typeof obj !== 'object' || obj === null) {\n      return;\n    }\n    var m = meta$$1 === undefined ? meta(obj) : meta$$1;\n    var counter = m.peekWatching(keyPath) || 0;\n\n    m.writeWatching(keyPath, counter + 1);\n    if (counter === 0) {\n      // activate watching first time\n      m.writableChains(makeChainNode).add(keyPath);\n    }\n  }\n\n  function unwatchPath(obj, keyPath, meta$$1) {\n    if (typeof obj !== 'object' || obj === null) {\n      return;\n    }\n    var m = meta$$1 === undefined ? exports.peekMeta(obj) : meta$$1;\n\n    if (m === undefined) {\n      return;\n    }\n    var counter = m.peekWatching(keyPath) || 0;\n\n    if (counter === 1) {\n      m.writeWatching(keyPath, 0);\n      m.writableChains(makeChainNode).remove(keyPath);\n    } else if (counter > 1) {\n      m.writeWatching(keyPath, counter - 1);\n    }\n  }\n\n  var FIRST_KEY = /^([^\\.]+)/;\n\n  function firstKey(path) {\n    return path.match(FIRST_KEY)[0];\n  }\n\n  function isObject(obj) {\n    return typeof obj === 'object' && obj !== null;\n  }\n\n  function isVolatile(obj) {\n    return !(isObject(obj) && obj.isDescriptor && obj._volatile === false);\n  }\n\n  var ChainWatchers = function () {\n    function ChainWatchers() {\n      emberBabel.classCallCheck(this, ChainWatchers);\n\n      // chain nodes that reference a key in this obj by key\n      // we only create ChainWatchers when we are going to add them\n      // so create this upfront\n      this.chains = Object.create(null);\n    }\n\n    ChainWatchers.prototype.add = function add(key, node) {\n      var nodes = this.chains[key];\n      if (nodes === undefined) {\n        this.chains[key] = [node];\n      } else {\n        nodes.push(node);\n      }\n    };\n\n    ChainWatchers.prototype.remove = function remove(key, node) {\n      var nodes = this.chains[key];\n      if (nodes !== undefined) {\n        for (var i = 0; i < nodes.length; i++) {\n          if (nodes[i] === node) {\n            nodes.splice(i, 1);\n            break;\n          }\n        }\n      }\n    };\n\n    ChainWatchers.prototype.has = function has(key, node) {\n      var nodes = this.chains[key];\n      if (nodes !== undefined) {\n        for (var i = 0; i < nodes.length; i++) {\n          if (nodes[i] === node) {\n            return true;\n          }\n        }\n      }\n      return false;\n    };\n\n    ChainWatchers.prototype.revalidateAll = function revalidateAll() {\n      for (var key in this.chains) {\n        this.notify(key, true, undefined);\n      }\n    };\n\n    ChainWatchers.prototype.revalidate = function revalidate(key) {\n      this.notify(key, true, undefined);\n    };\n\n    // key: the string key that is part of a path changed\n    // revalidate: boolean; the chains that are watching this value should revalidate\n    // callback: function that will be called with the object and path that\n    //           will be/are invalidated by this key change, depending on\n    //           whether the revalidate flag is passed\n\n\n    ChainWatchers.prototype.notify = function notify(key, revalidate, callback) {\n      var nodes = this.chains[key];\n      if (nodes === undefined || nodes.length === 0) {\n        return;\n      }\n\n      var affected = void 0;\n\n      if (callback) {\n        affected = [];\n      }\n\n      for (var i = 0; i < nodes.length; i++) {\n        nodes[i].notify(revalidate, affected);\n      }\n\n      if (callback === undefined) {\n        return;\n      }\n\n      // we gather callbacks so we don't notify them during revalidation\n      for (var _i = 0; _i < affected.length; _i += 2) {\n        var obj = affected[_i];\n        var path = affected[_i + 1];\n        callback(obj, path);\n      }\n    };\n\n    return ChainWatchers;\n  }();\n\n  function makeChainWatcher() {\n    return new ChainWatchers();\n  }\n\n  function addChainWatcher(obj, keyName, node) {\n    var m = meta(obj);\n    m.writableChainWatchers(makeChainWatcher).add(keyName, node);\n    watchKey(obj, keyName, m);\n  }\n\n  function removeChainWatcher(obj, keyName, node, _meta) {\n    if (!isObject(obj)) {\n      return;\n    }\n\n    var meta$$1 = _meta === undefined ? exports.peekMeta(obj) : _meta;\n\n    if (meta$$1 === undefined || meta$$1.readableChainWatchers() === undefined) {\n      return;\n    }\n\n    // make meta writable\n    meta$$1 = meta(obj);\n\n    meta$$1.readableChainWatchers().remove(keyName, node);\n\n    unwatchKey(obj, keyName, meta$$1);\n  }\n\n  // A ChainNode watches a single key on an object. If you provide a starting\n  // value for the key then the node won't actually watch it. For a root node\n  // pass null for parent and key and object for value.\n\n  var ChainNode = function () {\n    function ChainNode(parent, key, value) {\n      emberBabel.classCallCheck(this, ChainNode);\n\n      this._parent = parent;\n      this._key = key;\n\n      // _watching is true when calling get(this._parent, this._key) will\n      // return the value of this node.\n      //\n      // It is false for the root of a chain (because we have no parent)\n      // and for global paths (because the parent node is the object with\n      // the observer on it)\n      var isWatching = this._watching = value === undefined;\n\n      this._chains = undefined;\n      this._object = undefined;\n      this.count = 0;\n\n      this._value = value;\n      this._paths = undefined;\n      if (isWatching) {\n        var obj = parent.value();\n\n        if (!isObject(obj)) {\n          return;\n        }\n\n        this._object = obj;\n\n        addChainWatcher(this._object, this._key, this);\n      }\n    }\n\n    ChainNode.prototype.value = function value() {\n      if (this._value === undefined && this._watching) {\n        var obj = this._parent.value();\n        this._value = lazyGet(obj, this._key);\n      }\n      return this._value;\n    };\n\n    ChainNode.prototype.destroy = function destroy() {\n      if (this._watching) {\n        removeChainWatcher(this._object, this._key, this);\n        this._watching = false; // so future calls do nothing\n      }\n    };\n\n    // copies a top level object only\n\n\n    ChainNode.prototype.copy = function copy(obj) {\n      var ret = new ChainNode(null, null, obj);\n      var paths = this._paths;\n      if (paths !== undefined) {\n        var path = void 0;\n        for (path in paths) {\n          if (paths[path] > 0) {\n            ret.add(path);\n          }\n        }\n      }\n      return ret;\n    };\n\n    // called on the root node of a chain to setup watchers on the specified\n    // path.\n\n\n    ChainNode.prototype.add = function add(path) {\n      var paths = this._paths || (this._paths = {});\n      paths[path] = (paths[path] || 0) + 1;\n\n      var key = firstKey(path);\n      var tail = path.slice(key.length + 1);\n\n      this.chain(key, tail);\n    };\n\n    // called on the root node of a chain to teardown watcher on the specified\n    // path\n\n\n    ChainNode.prototype.remove = function remove(path) {\n      var paths = this._paths;\n      if (paths === undefined) {\n        return;\n      }\n      if (paths[path] > 0) {\n        paths[path]--;\n      }\n\n      var key = firstKey(path);\n      var tail = path.slice(key.length + 1);\n\n      this.unchain(key, tail);\n    };\n\n    ChainNode.prototype.chain = function chain(key, path) {\n      var chains = this._chains;\n      var node = void 0;\n      if (chains === undefined) {\n        chains = this._chains = Object.create(null);\n      } else {\n        node = chains[key];\n      }\n\n      if (node === undefined) {\n        node = chains[key] = new ChainNode(this, key, undefined);\n      }\n\n      node.count++; // count chains...\n\n      // chain rest of path if there is one\n      if (path) {\n        key = firstKey(path);\n        path = path.slice(key.length + 1);\n        node.chain(key, path);\n      }\n    };\n\n    ChainNode.prototype.unchain = function unchain(key, path) {\n      var chains = this._chains;\n      var node = chains[key];\n\n      // unchain rest of path first...\n      if (path && path.length > 1) {\n        var nextKey = firstKey(path);\n        var nextPath = path.slice(nextKey.length + 1);\n        node.unchain(nextKey, nextPath);\n      }\n\n      // delete node if needed.\n      node.count--;\n      if (node.count <= 0) {\n        chains[node._key] = undefined;\n        node.destroy();\n      }\n    };\n\n    ChainNode.prototype.notify = function notify(revalidate, affected) {\n      if (revalidate && this._watching) {\n        var parentValue = this._parent.value();\n\n        if (parentValue !== this._object) {\n          removeChainWatcher(this._object, this._key, this);\n\n          if (isObject(parentValue)) {\n            this._object = parentValue;\n            addChainWatcher(parentValue, this._key, this);\n          } else {\n            this._object = undefined;\n          }\n        }\n        this._value = undefined;\n      }\n\n      // then notify chains...\n      var chains = this._chains;\n      if (chains !== undefined) {\n        var node = void 0;\n        for (var key in chains) {\n          node = chains[key];\n          if (node !== undefined) {\n            node.notify(revalidate, affected);\n          }\n        }\n      }\n\n      if (affected && this._parent) {\n        this._parent.populateAffected(this._key, 1, affected);\n      }\n    };\n\n    ChainNode.prototype.populateAffected = function populateAffected(path, depth, affected) {\n      if (this._key) {\n        path = this._key + '.' + path;\n      }\n\n      if (this._parent) {\n        this._parent.populateAffected(path, depth + 1, affected);\n      } else if (depth > 1) {\n        affected.push(this.value(), path);\n      }\n    };\n\n    return ChainNode;\n  }();\n\n  function lazyGet(obj, key) {\n    if (!isObject(obj)) {\n      return;\n    }\n\n    var meta$$1 = exports.peekMeta(obj);\n\n    // check if object meant only to be a prototype\n    if (meta$$1 !== undefined && meta$$1.proto === obj) {\n      return;\n    }\n\n    // Use `get` if the return value is an EachProxy or an uncacheable value.\n    if (isVolatile(obj[key])) {\n      return get(obj, key);\n      // Otherwise attempt to get the cached value of the computed property\n    } else {\n      var cache = meta$$1.readableCache();\n      if (cache !== undefined) {\n        return cacheFor.get(cache, key);\n      }\n    }\n  }\n\n  function finishChains(meta$$1) {\n    // finish any current chains node watchers that reference obj\n    var chainWatchers = meta$$1.readableChainWatchers();\n    if (chainWatchers !== undefined) {\n      chainWatchers.revalidateAll();\n    }\n    // ensure that if we have inherited any chains they have been\n    // copied onto our own meta.\n    if (meta$$1.readableChains() !== undefined) {\n      meta$$1.writableChains(makeChainNode);\n    }\n  }\n\n  var counters = void 0;\n  {\n    counters = {\n      peekCalls: 0,\n      peekParentCalls: 0,\n      peekPrototypeWalks: 0,\n      setCalls: 0,\n      deleteCalls: 0,\n      metaCalls: 0,\n      metaInstantiated: 0\n    };\n  }\n\n  /**\n  @module ember\n  */\n\n  var UNDEFINED = emberUtils.symbol('undefined');\n\n  // FLAGS\n  var SOURCE_DESTROYING = 1 << 1;\n  var SOURCE_DESTROYED = 1 << 2;\n  var META_DESTROYED = 1 << 3;\n  var IS_PROXY = 1 << 4;\n\n  var META_FIELD = '__ember_meta__';\n  var NODE_STACK = [];\n\n  var Meta = function () {\n    function Meta(obj, parentMeta) {\n      emberBabel.classCallCheck(this, Meta);\n\n      {\n        counters.metaInstantiated++;\n      }\n\n      this._cache = undefined;\n      this._weak = undefined;\n      this._watching = undefined;\n      this._mixins = undefined;\n      this._bindings = undefined;\n      this._values = undefined;\n      this._deps = undefined;\n      this._chainWatchers = undefined;\n      this._chains = undefined;\n      this._tag = undefined;\n      this._tags = undefined;\n      this._factory = undefined;\n\n      // initial value for all flags right now is false\n      // see FLAGS const for detailed list of flags used\n      this._flags = 0;\n\n      // used only internally\n      this.source = obj;\n\n      // when meta(obj).proto === obj, the object is intended to be only a\n      // prototype and doesn't need to actually be observable itself\n      this.proto = undefined;\n\n      // The next meta in our inheritance chain. We (will) track this\n      // explicitly instead of using prototypical inheritance because we\n      // have detailed knowledge of how each property should really be\n      // inherited, and we can optimize it much better than JS runtimes.\n      this.parent = parentMeta;\n\n      this._listeners = undefined;\n      this._listenersFinalized = false;\n      this._suspendedListeners = undefined;\n    }\n\n    Meta.prototype.isInitialized = function isInitialized(obj) {\n      return this.proto !== obj;\n    };\n\n    Meta.prototype.destroy = function destroy() {\n      if (this.isMetaDestroyed()) {\n        return;\n      }\n\n      // remove chainWatchers to remove circular references that would prevent GC\n      var nodes = void 0,\n          key = void 0,\n          nodeObject = void 0;\n      var node = this.readableChains();\n      if (node !== undefined) {\n        NODE_STACK.push(node);\n        // process tree\n        while (NODE_STACK.length > 0) {\n          node = NODE_STACK.pop();\n          // push children\n          nodes = node._chains;\n          if (nodes !== undefined) {\n            for (key in nodes) {\n              if (nodes[key] !== undefined) {\n                NODE_STACK.push(nodes[key]);\n              }\n            }\n          }\n\n          // remove chainWatcher in node object\n          if (node._watching) {\n            nodeObject = node._object;\n            if (nodeObject !== undefined) {\n              var foreignMeta = exports.peekMeta(nodeObject);\n              // avoid cleaning up chain watchers when both current and\n              // foreign objects are being destroyed\n              // if both are being destroyed manual cleanup is not needed\n              // as they will be GC'ed and no non-destroyed references will\n              // be remaining\n              if (foreignMeta && !foreignMeta.isSourceDestroying()) {\n                removeChainWatcher(nodeObject, node._key, node, foreignMeta);\n              }\n            }\n          }\n        }\n      }\n\n      this.setMetaDestroyed();\n    };\n\n    Meta.prototype.isSourceDestroying = function isSourceDestroying() {\n      return (this._flags & SOURCE_DESTROYING) !== 0;\n    };\n\n    Meta.prototype.setSourceDestroying = function setSourceDestroying() {\n      this._flags |= SOURCE_DESTROYING;\n    };\n\n    Meta.prototype.isSourceDestroyed = function isSourceDestroyed() {\n      return (this._flags & SOURCE_DESTROYED) !== 0;\n    };\n\n    Meta.prototype.setSourceDestroyed = function setSourceDestroyed() {\n      this._flags |= SOURCE_DESTROYED;\n    };\n\n    Meta.prototype.isMetaDestroyed = function isMetaDestroyed() {\n      return (this._flags & META_DESTROYED) !== 0;\n    };\n\n    Meta.prototype.setMetaDestroyed = function setMetaDestroyed() {\n      this._flags |= META_DESTROYED;\n    };\n\n    Meta.prototype.isProxy = function isProxy() {\n      return (this._flags & IS_PROXY) !== 0;\n    };\n\n    Meta.prototype.setProxy = function setProxy() {\n      this._flags |= IS_PROXY;\n    };\n\n    Meta.prototype._getOrCreateOwnMap = function _getOrCreateOwnMap(key) {\n      return this[key] || (this[key] = Object.create(null));\n    };\n\n    Meta.prototype._getInherited = function _getInherited(key) {\n      var pointer = this;\n      while (pointer !== undefined) {\n        var map = pointer[key];\n        if (map !== undefined) {\n          return map;\n        }\n        pointer = pointer.parent;\n      }\n    };\n\n    Meta.prototype._findInherited = function _findInherited(key, subkey) {\n      var pointer = this;\n      while (pointer !== undefined) {\n        var map = pointer[key];\n        if (map !== undefined) {\n          var value = map[subkey];\n          if (value !== undefined) {\n            return value;\n          }\n        }\n        pointer = pointer.parent;\n      }\n    };\n\n    // Implements a member that provides a lazily created map of maps,\n    // with inheritance at both levels.\n\n\n    Meta.prototype.writeDeps = function writeDeps(subkey, itemkey, value) {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot modify dependent keys for `' + itemkey + '` on `' + emberUtils.toString(this.source) + '` after it has been destroyed.', !this.isMetaDestroyed());\n\n      var outerMap = this._getOrCreateOwnMap('_deps');\n      var innerMap = outerMap[subkey];\n      if (innerMap === undefined) {\n        innerMap = outerMap[subkey] = Object.create(null);\n      }\n      innerMap[itemkey] = value;\n    };\n\n    Meta.prototype.peekDeps = function peekDeps(subkey, itemkey) {\n      var pointer = this;\n      while (pointer !== undefined) {\n        var map = pointer._deps;\n        if (map !== undefined) {\n          var value = map[subkey];\n          if (value !== undefined) {\n            var itemvalue = value[itemkey];\n            if (itemvalue !== undefined) {\n              return itemvalue;\n            }\n          }\n        }\n        pointer = pointer.parent;\n      }\n    };\n\n    Meta.prototype.hasDeps = function hasDeps(subkey) {\n      var pointer = this;\n      while (pointer !== undefined) {\n        var deps = pointer._deps;\n        if (deps !== undefined && deps[subkey] !== undefined) {\n          return true;\n        }\n        pointer = pointer.parent;\n      }\n      return false;\n    };\n\n    Meta.prototype.forEachInDeps = function forEachInDeps(subkey, fn) {\n      return this._forEachIn('_deps', subkey, fn);\n    };\n\n    Meta.prototype._forEachIn = function _forEachIn(key, subkey, fn) {\n      var pointer = this;\n      var seen = void 0;\n      var calls = void 0;\n      while (pointer !== undefined) {\n        var map = pointer[key];\n        if (map !== undefined) {\n          var innerMap = map[subkey];\n          if (innerMap !== undefined) {\n            for (var innerKey in innerMap) {\n              seen = seen || Object.create(null);\n              if (seen[innerKey] === undefined) {\n                seen[innerKey] = true;\n                calls = calls || [];\n                calls.push(innerKey, innerMap[innerKey]);\n              }\n            }\n          }\n        }\n        pointer = pointer.parent;\n      }\n\n      if (calls !== undefined) {\n        for (var i = 0; i < calls.length; i += 2) {\n          fn(calls[i], calls[i + 1]);\n        }\n      }\n    };\n\n    Meta.prototype.writableCache = function writableCache() {\n      return this._getOrCreateOwnMap('_cache');\n    };\n\n    Meta.prototype.readableCache = function readableCache() {\n      return this._cache;\n    };\n\n    Meta.prototype.writableWeak = function writableWeak() {\n      return this._getOrCreateOwnMap('_weak');\n    };\n\n    Meta.prototype.readableWeak = function readableWeak() {\n      return this._weak;\n    };\n\n    Meta.prototype.writableTags = function writableTags() {\n      return this._getOrCreateOwnMap('_tags');\n    };\n\n    Meta.prototype.readableTags = function readableTags() {\n      return this._tags;\n    };\n\n    Meta.prototype.writableTag = function writableTag(create) {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot create a new tag for `' + emberUtils.toString(this.source) + '` after it has been destroyed.', !this.isMetaDestroyed());\n\n      var ret = this._tag;\n      if (ret === undefined) {\n        ret = this._tag = create(this.source);\n      }\n      return ret;\n    };\n\n    Meta.prototype.readableTag = function readableTag() {\n      return this._tag;\n    };\n\n    Meta.prototype.writableChainWatchers = function writableChainWatchers(create) {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot create a new chain watcher for `' + emberUtils.toString(this.source) + '` after it has been destroyed.', !this.isMetaDestroyed());\n\n      var ret = this._chainWatchers;\n      if (ret === undefined) {\n        ret = this._chainWatchers = create(this.source);\n      }\n      return ret;\n    };\n\n    Meta.prototype.readableChainWatchers = function readableChainWatchers() {\n      return this._chainWatchers;\n    };\n\n    Meta.prototype.writableChains = function writableChains(create) {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot create a new chains for `' + emberUtils.toString(this.source) + '` after it has been destroyed.', !this.isMetaDestroyed());\n\n      var ret = this._chains;\n      if (ret === undefined) {\n        if (this.parent === undefined) {\n          ret = create(this.source);\n        } else {\n          ret = this.parent.writableChains(create).copy(this.source);\n        }\n        this._chains = ret;\n      }\n      return ret;\n    };\n\n    Meta.prototype.readableChains = function readableChains() {\n      return this._getInherited('_chains');\n    };\n\n    Meta.prototype.writeWatching = function writeWatching(subkey, value) {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot update watchers for `' + subkey + '` on `' + emberUtils.toString(this.source) + '` after it has been destroyed.', !this.isMetaDestroyed());\n\n      var map = this._getOrCreateOwnMap('_watching');\n      map[subkey] = value;\n    };\n\n    Meta.prototype.peekWatching = function peekWatching(subkey) {\n      return this._findInherited('_watching', subkey);\n    };\n\n    Meta.prototype.writeMixins = function writeMixins(subkey, value) {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot add mixins for `' + subkey + '` on `' + emberUtils.toString(this.source) + '` call writeMixins after it has been destroyed.', !this.isMetaDestroyed());\n\n      var map = this._getOrCreateOwnMap('_mixins');\n      map[subkey] = value;\n    };\n\n    Meta.prototype.peekMixins = function peekMixins(subkey) {\n      return this._findInherited('_mixins', subkey);\n    };\n\n    Meta.prototype.forEachMixins = function forEachMixins(fn) {\n      var pointer = this;\n      var seen = void 0;\n      while (pointer !== undefined) {\n        var map = pointer._mixins;\n        if (map !== undefined) {\n          for (var key in map) {\n            seen = seen || Object.create(null);\n            if (seen[key] === undefined) {\n              seen[key] = true;\n              fn(key, map[key]);\n            }\n          }\n        }\n        pointer = pointer.parent;\n      }\n    };\n\n    Meta.prototype.writeBindings = function writeBindings(subkey, value) {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot add a binding for `' + subkey + '` on `' + emberUtils.toString(this.source) + '` after it has been destroyed.', !this.isMetaDestroyed());\n\n      var map = this._getOrCreateOwnMap('_bindings');\n      map[subkey] = value;\n    };\n\n    Meta.prototype.peekBindings = function peekBindings(subkey) {\n      return this._findInherited('_bindings', subkey);\n    };\n\n    Meta.prototype.forEachBindings = function forEachBindings(fn) {\n      var pointer = this;\n      var seen = void 0;\n      while (pointer !== undefined) {\n        var map = pointer._bindings;\n        if (map !== undefined) {\n          for (var key in map) {\n            seen = seen || Object.create(null);\n            if (seen[key] === undefined) {\n              seen[key] = true;\n              fn(key, map[key]);\n            }\n          }\n        }\n        pointer = pointer.parent;\n      }\n    };\n\n    Meta.prototype.clearBindings = function clearBindings() {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot clear bindings on `' + emberUtils.toString(this.source) + '` after it has been destroyed.', !this.isMetaDestroyed());\n\n      this._bindings = undefined;\n    };\n\n    Meta.prototype.writeValues = function writeValues(subkey, value) {\n      true && !!this.isMetaDestroyed() && emberDebug.assert('Cannot set the value of `' + subkey + '` on `' + emberUtils.toString(this.source) + '` after it has been destroyed.', !this.isMetaDestroyed());\n\n      var map = this._getOrCreateOwnMap('_values');\n      map[subkey] = value;\n    };\n\n    Meta.prototype.peekValues = function peekValues(subkey) {\n      return this._findInherited('_values', subkey);\n    };\n\n    Meta.prototype.deleteFromValues = function deleteFromValues(subkey) {\n      delete this._getOrCreateOwnMap('_values')[subkey];\n    };\n\n    emberBabel.createClass(Meta, [{\n      key: 'factory',\n      set: function (factory) {\n        this._factory = factory;\n      },\n      get: function () {\n        return this._factory;\n      }\n    }]);\n\n    return Meta;\n  }();\n\n  for (var name in protoMethods) {\n    Meta.prototype[name] = protoMethods[name];\n  }\n\n  var META_DESC = {\n    writable: true,\n    configurable: true,\n    enumerable: false,\n    value: null\n  };\n\n  var EMBER_META_PROPERTY = {\n    name: META_FIELD,\n    descriptor: META_DESC\n  };\n\n  if (ember_features.MANDATORY_SETTER) {\n    Meta.prototype.readInheritedValue = function (key, subkey) {\n      var internalKey = '_' + key;\n\n      var pointer = this;\n\n      while (pointer !== undefined) {\n        var map = pointer[internalKey];\n        if (map !== undefined) {\n          var value = map[subkey];\n          if (value !== undefined || subkey in map) {\n            return value;\n          }\n        }\n        pointer = pointer.parent;\n      }\n\n      return UNDEFINED;\n    };\n\n    Meta.prototype.writeValue = function (obj, key, value) {\n      var descriptor = emberUtils.lookupDescriptor(obj, key);\n      var isMandatorySetter = descriptor !== null && descriptor.set && descriptor.set.isMandatorySetter;\n\n      if (isMandatorySetter) {\n        this.writeValues(key, value);\n      } else {\n        obj[key] = value;\n      }\n    };\n  }\n\n  var setMeta = void 0;\n  exports.peekMeta = void 0;\n\n  // choose the one appropriate for given platform\n  if (emberUtils.HAS_NATIVE_WEAKMAP) {\n    var getPrototypeOf = Object.getPrototypeOf;\n    var metaStore = new WeakMap();\n\n    setMeta = function WeakMap_setMeta(obj, meta) {\n      {\n        counters.setCalls++;\n      }\n      metaStore.set(obj, meta);\n    };\n\n    exports.peekMeta = function WeakMap_peekParentMeta(obj) {\n      var pointer = obj;\n      var meta = void 0;\n      while (pointer !== undefined && pointer !== null) {\n        meta = metaStore.get(pointer);\n        // jshint loopfunc:true\n        {\n          counters.peekCalls++;\n        }\n        if (meta !== undefined) {\n          return meta;\n        }\n\n        pointer = getPrototypeOf(pointer);\n        {\n          counters.peekPrototypeWalks++;\n        }\n      }\n    };\n  } else {\n    setMeta = function Fallback_setMeta(obj, meta) {\n      if (obj.__defineNonEnumerable) {\n        obj.__defineNonEnumerable(EMBER_META_PROPERTY);\n      } else {\n        Object.defineProperty(obj, META_FIELD, META_DESC);\n      }\n\n      obj[META_FIELD] = meta;\n    };\n\n    exports.peekMeta = function Fallback_peekMeta(obj) {\n      return obj[META_FIELD];\n    };\n  }\n\n  /**\n    Tears down the meta on an object so that it can be garbage collected.\n    Multiple calls will have no effect.\n  \n    @method deleteMeta\n    @for Ember\n    @param {Object} obj  the object to destroy\n    @return {void}\n    @private\n  */\n  function deleteMeta(obj) {\n    {\n      counters.deleteCalls++;\n    }\n\n    var meta = exports.peekMeta(obj);\n    if (meta !== undefined) {\n      meta.destroy();\n    }\n  }\n\n  /**\n    Retrieves the meta hash for an object. If `writable` is true ensures the\n    hash is writable for this object as well.\n  \n    The meta object contains information about computed property descriptors as\n    well as any watched properties and other information. You generally will\n    not access this information directly but instead work with higher level\n    methods that manipulate this hash indirectly.\n  \n    @method meta\n    @for Ember\n    @private\n  \n    @param {Object} obj The object to retrieve meta for\n    @param {Boolean} [writable=true] Pass `false` if you do not intend to modify\n      the meta hash, allowing the method to avoid making an unnecessary copy.\n    @return {Object} the meta hash for an object\n  */\n  function meta(obj) {\n    {\n      counters.metaCalls++;\n    }\n\n    var maybeMeta = exports.peekMeta(obj);\n    var parent = void 0;\n\n    // remove this code, in-favor of explicit parent\n    if (maybeMeta !== undefined) {\n      if (maybeMeta.source === obj) {\n        return maybeMeta;\n      }\n      parent = maybeMeta;\n    }\n\n    var newMeta = new Meta(obj, parent);\n    setMeta(obj, newMeta);\n    return newMeta;\n  }\n\n  var Cache = function () {\n    function Cache(limit, func, key, store) {\n      emberBabel.classCallCheck(this, Cache);\n\n      this.size = 0;\n      this.misses = 0;\n      this.hits = 0;\n      this.limit = limit;\n      this.func = func;\n      this.key = key;\n      this.store = store || new DefaultStore();\n    }\n\n    Cache.prototype.get = function get(obj) {\n      var key = this.key === undefined ? obj : this.key(obj);\n      var value = this.store.get(key);\n      if (value === undefined) {\n        this.misses++;\n        value = this._set(key, this.func(obj));\n      } else if (value === UNDEFINED) {\n        this.hits++;\n        value = undefined;\n      } else {\n        this.hits++;\n        // nothing to translate\n      }\n\n      return value;\n    };\n\n    Cache.prototype.set = function set(obj, value) {\n      var key = this.key === undefined ? obj : this.key(obj);\n      return this._set(key, value);\n    };\n\n    Cache.prototype._set = function _set(key, value) {\n      if (this.limit > this.size) {\n        this.size++;\n        if (value === undefined) {\n          this.store.set(key, UNDEFINED);\n        } else {\n          this.store.set(key, value);\n        }\n      }\n\n      return value;\n    };\n\n    Cache.prototype.purge = function purge() {\n      this.store.clear();\n      this.size = 0;\n      this.hits = 0;\n      this.misses = 0;\n    };\n\n    return Cache;\n  }();\n\n  var DefaultStore = function () {\n    function DefaultStore() {\n      emberBabel.classCallCheck(this, DefaultStore);\n\n      this.data = Object.create(null);\n    }\n\n    DefaultStore.prototype.get = function get(key) {\n      return this.data[key];\n    };\n\n    DefaultStore.prototype.set = function set(key, value) {\n      this.data[key] = value;\n    };\n\n    DefaultStore.prototype.clear = function clear() {\n      this.data = Object.create(null);\n    };\n\n    return DefaultStore;\n  }();\n\n  var IS_GLOBAL_PATH = /^[A-Z$].*[\\.]/;\n\n  var isGlobalPathCache = new Cache(1000, function (key) {\n    return IS_GLOBAL_PATH.test(key);\n  });\n  var firstDotIndexCache = new Cache(1000, function (key) {\n    return key.indexOf('.');\n  });\n\n  var firstKeyCache = new Cache(1000, function (path) {\n    var index = firstDotIndexCache.get(path);\n    return index === -1 ? path : path.slice(0, index);\n  });\n\n  var tailPathCache = new Cache(1000, function (path) {\n    var index = firstDotIndexCache.get(path);\n    return index === -1 ? undefined : path.slice(index + 1);\n  });\n\n  function isGlobalPath(path) {\n    return isGlobalPathCache.get(path);\n  }\n\n  function isPath(path) {\n    return firstDotIndexCache.get(path) !== -1;\n  }\n\n  function getFirstKey(path) {\n    return firstKeyCache.get(path);\n  }\n\n  function getTailPath(path) {\n    return tailPathCache.get(path);\n  }\n\n  /**\n  @module @ember/object\n  */\n\n  var ALLOWABLE_TYPES = {\n    object: true,\n    function: true,\n    string: true\n  };\n\n  // ..........................................................\n  // GET AND SET\n  //\n  // If we are on a platform that supports accessors we can use those.\n  // Otherwise simulate accessors by looking up the property directly on the\n  // object.\n\n  /**\n    Gets the value of a property on an object. If the property is computed,\n    the function will be invoked. If the property is not defined but the\n    object implements the `unknownProperty` method then that will be invoked.\n  \n    ```javascript\n    Ember.get(obj, \"name\");\n    ```\n  \n    If you plan to run on IE8 and older browsers then you should use this\n    method anytime you want to retrieve a property on an object that you don't\n    know for sure is private. (Properties beginning with an underscore '_'\n    are considered private.)\n  \n    On all newer browsers, you only need to use this method to retrieve\n    properties if the property might not be defined on the object and you want\n    to respect the `unknownProperty` handler. Otherwise you can ignore this\n    method.\n  \n    Note that if the object itself is `undefined`, this method will throw\n    an error.\n  \n    @method get\n    @for @ember/object\n    @static\n    @param {Object} obj The object to retrieve from.\n    @param {String} keyName The property key to retrieve\n    @return {Object} the property value or `null`.\n    @public\n  */\n  function get(obj, keyName) {\n    true && !(arguments.length === 2) && emberDebug.assert('Get must be called with two arguments; an object and a property key', arguments.length === 2);\n    true && !(obj !== undefined && obj !== null) && emberDebug.assert('Cannot call get with \\'' + keyName + '\\' on an undefined object.', obj !== undefined && obj !== null);\n    true && !(typeof keyName === 'string') && emberDebug.assert('The key provided to get must be a string, you passed ' + keyName, typeof keyName === 'string');\n    true && !(keyName.lastIndexOf('this.', 0) !== 0) && emberDebug.assert('\\'this\\' in paths is not supported', keyName.lastIndexOf('this.', 0) !== 0);\n    true && !(keyName !== '') && emberDebug.assert('Cannot call `Ember.get` with an empty string', keyName !== '');\n\n    var value = obj[keyName];\n    var isDescriptor = value !== null && typeof value === 'object' && value.isDescriptor;\n\n    if (isDescriptor) {\n      return value.get(obj, keyName);\n    } else if (isPath(keyName)) {\n      return _getPath(obj, keyName);\n    } else if (value === undefined && 'object' === typeof obj && !(keyName in obj) && typeof obj.unknownProperty === 'function') {\n      return obj.unknownProperty(keyName);\n    } else {\n      return value;\n    }\n  }\n\n  function _getPath(root, path) {\n    var obj = root;\n    var parts = path.split('.');\n\n    for (var i = 0; i < parts.length; i++) {\n      if (!isGettable(obj)) {\n        return undefined;\n      }\n\n      obj = get(obj, parts[i]);\n\n      if (obj && obj.isDestroyed) {\n        return undefined;\n      }\n    }\n\n    return obj;\n  }\n\n  function isGettable(obj) {\n    return obj !== undefined && obj !== null && ALLOWABLE_TYPES[typeof obj];\n  }\n\n  /**\n    Retrieves the value of a property from an Object, or a default value in the\n    case that the property returns `undefined`.\n  \n    ```javascript\n    Ember.getWithDefault(person, 'lastName', 'Doe');\n    ```\n  \n    @method getWithDefault\n    @for @ember/object\n    @static\n    @param {Object} obj The object to retrieve from.\n    @param {String} keyName The name of the property to retrieve\n    @param {Object} defaultValue The value to return if the property value is undefined\n    @return {Object} The property value or the defaultValue.\n    @public\n  */\n  function getWithDefault(root, key, defaultValue) {\n    var value = get(root, key);\n\n    if (value === undefined) {\n      return defaultValue;\n    }\n    return value;\n  }\n\n  /**\n   @module @ember/object\n  */\n  /**\n    Sets the value of a property on an object, respecting computed properties\n    and notifying observers and other listeners of the change. If the\n    property is not defined but the object implements the `setUnknownProperty`\n    method then that will be invoked as well.\n  \n    ```javascript\n    Ember.set(obj, \"name\", value);\n    ```\n  \n    @method set\n    @static\n    @for @ember/object\n    @param {Object} obj The object to modify.\n    @param {String} keyName The property key to set\n    @param {Object} value The value to set\n    @return {Object} the passed value.\n    @public\n  */\n  function set(obj, keyName, value, tolerant) {\n    true && !(arguments.length === 3 || arguments.length === 4) && emberDebug.assert('Set must be called with three or four arguments; an object, a property key, a value and tolerant true/false', arguments.length === 3 || arguments.length === 4);\n    true && !(obj && typeof obj === 'object' || typeof obj === 'function') && emberDebug.assert('Cannot call set with \\'' + keyName + '\\' on an undefined object.', obj && typeof obj === 'object' || typeof obj === 'function');\n    true && !(typeof keyName === 'string') && emberDebug.assert('The key provided to set must be a string, you passed ' + keyName, typeof keyName === 'string');\n    true && !(keyName.lastIndexOf('this.', 0) !== 0) && emberDebug.assert('\\'this\\' in paths is not supported', keyName.lastIndexOf('this.', 0) !== 0);\n    true && !!obj.isDestroyed && emberDebug.assert('calling set on destroyed object: ' + emberUtils.toString(obj) + '.' + keyName + ' = ' + emberUtils.toString(value), !obj.isDestroyed);\n\n    if (isPath(keyName)) {\n      return setPath(obj, keyName, value, tolerant);\n    }\n\n    var currentValue = obj[keyName];\n    var isDescriptor = currentValue !== null && typeof currentValue === 'object' && currentValue.isDescriptor;\n\n    if (isDescriptor) {\n      /* computed property */\n      currentValue.set(obj, keyName, value);\n    } else if (currentValue === undefined && 'object' === typeof obj && !(keyName in obj) && typeof obj.setUnknownProperty === 'function') {\n      /* unknown property */\n      obj.setUnknownProperty(keyName, value);\n    } else if (currentValue === value) {/* no change */\n    } else {\n      var meta$$1 = exports.peekMeta(obj);\n      propertyWillChange(obj, keyName, meta$$1);\n\n      if (ember_features.MANDATORY_SETTER) {\n        setWithMandatorySetter(meta$$1, obj, keyName, value);\n      } else {\n        obj[keyName] = value;\n      }\n\n      propertyDidChange(obj, keyName, meta$$1);\n    }\n\n    return value;\n  }\n\n  if (ember_features.MANDATORY_SETTER) {\n    var setWithMandatorySetter = function (meta$$1, obj, keyName, value) {\n      if (meta$$1 !== undefined && meta$$1.peekWatching(keyName) > 0) {\n        makeEnumerable(obj, keyName);\n        meta$$1.writeValue(obj, keyName, value);\n      } else {\n        obj[keyName] = value;\n      }\n    };\n\n    var makeEnumerable = function (obj, key) {\n      var desc = Object.getOwnPropertyDescriptor(obj, key);\n\n      if (desc && desc.set && desc.set.isMandatorySetter) {\n        desc.enumerable = true;\n        Object.defineProperty(obj, key, desc);\n      }\n    };\n  }\n\n  function setPath(root, path, value, tolerant) {\n    var parts = path.split('.');\n    var keyName = parts.pop();\n\n    true && !(keyName.trim().length > 0) && emberDebug.assert('Property set failed: You passed an empty path', keyName.trim().length > 0);\n\n    var newPath = parts.join('.');\n\n    var newRoot = _getPath(root, newPath);\n\n    if (newRoot) {\n      return set(newRoot, keyName, value);\n    } else if (!tolerant) {\n      throw new emberDebug.Error('Property set failed: object in path \"' + newPath + '\" could not be found or was destroyed.');\n    }\n  }\n\n  /**\n    Error-tolerant form of `Ember.set`. Will not blow up if any part of the\n    chain is `undefined`, `null`, or destroyed.\n  \n    This is primarily used when syncing bindings, which may try to update after\n    an object has been destroyed.\n  \n    @method trySet\n    @static\n    @for @ember/object\n    @param {Object} root The object to modify.\n    @param {String} path The property path to set\n    @param {Object} value The value to set\n    @public\n  */\n  function trySet(root, path, value) {\n    return set(root, path, value, true);\n  }\n\n  /**\n  @module @ember/object\n  */\n\n  var END_WITH_EACH_REGEX = /\\.@each$/;\n\n  /**\n    Expands `pattern`, invoking `callback` for each expansion.\n  \n    The only pattern supported is brace-expansion, anything else will be passed\n    once to `callback` directly.\n  \n    Example\n  \n    ```js\n    import { expandProperties } from '@ember/object/computed';\n  \n    function echo(arg){ console.log(arg); }\n  \n    expandProperties('foo.bar', echo);              //=> 'foo.bar'\n    expandProperties('{foo,bar}', echo);            //=> 'foo', 'bar'\n    expandProperties('foo.{bar,baz}', echo);        //=> 'foo.bar', 'foo.baz'\n    expandProperties('{foo,bar}.baz', echo);        //=> 'foo.baz', 'bar.baz'\n    expandProperties('foo.{bar,baz}.[]', echo)      //=> 'foo.bar.[]', 'foo.baz.[]'\n    expandProperties('{foo,bar}.{spam,eggs}', echo) //=> 'foo.spam', 'foo.eggs', 'bar.spam', 'bar.eggs'\n    expandProperties('{foo}.bar.{baz}')             //=> 'foo.bar.baz'\n    ```\n  \n    @method expandProperties\n    @static\n    @for @ember/object\n    @public\n    @param {String} pattern The property pattern to expand.\n    @param {Function} callback The callback to invoke.  It is invoked once per\n    expansion, and is passed the expansion.\n  */\n  function expandProperties(pattern, callback) {\n    true && !(typeof pattern === 'string') && emberDebug.assert('A computed property key must be a string, you passed ' + typeof pattern + ' ' + pattern, typeof pattern === 'string');\n    true && !(pattern.indexOf(' ') === -1) && emberDebug.assert('Brace expanded properties cannot contain spaces, e.g. \"user.{firstName, lastName}\" should be \"user.{firstName,lastName}\"', pattern.indexOf(' ') === -1);\n    // regex to look for double open, double close, or unclosed braces\n\n    true && !(pattern.match(/\\{[^}{]*\\{|\\}[^}{]*\\}|\\{[^}]*$/g) === null) && emberDebug.assert('Brace expanded properties have to be balanced and cannot be nested, pattern: ' + pattern, pattern.match(/\\{[^}{]*\\{|\\}[^}{]*\\}|\\{[^}]*$/g) === null);\n\n    var start = pattern.indexOf('{');\n    if (start < 0) {\n      callback(pattern.replace(END_WITH_EACH_REGEX, '.[]'));\n    } else {\n      dive('', pattern, start, callback);\n    }\n  }\n\n  function dive(prefix, pattern, start, callback) {\n    var end = pattern.indexOf('}'),\n        i = 0,\n        newStart = void 0,\n        arrayLength = void 0;\n    var tempArr = pattern.substring(start + 1, end).split(',');\n    var after = pattern.substring(end + 1);\n    prefix = prefix + pattern.substring(0, start);\n\n    arrayLength = tempArr.length;\n    while (i < arrayLength) {\n      newStart = after.indexOf('{');\n      if (newStart < 0) {\n        callback((prefix + tempArr[i++] + after).replace(END_WITH_EACH_REGEX, '.[]'));\n      } else {\n        dive(prefix + tempArr[i++], after, newStart, callback);\n      }\n    }\n  }\n\n  /**\n  @module ember\n  */\n  /**\n    Starts watching a property on an object. Whenever the property changes,\n    invokes `Ember.propertyWillChange` and `Ember.propertyDidChange`. This is the\n    primitive used by observers and dependent keys; usually you will never call\n    this method directly but instead use higher level methods like\n    `Ember.addObserver()`\n  \n    @private\n    @method watch\n    @for Ember\n    @param obj\n    @param {String} _keyPath\n  */\n  function watch(obj, _keyPath, m) {\n    if (isPath(_keyPath)) {\n      watchPath(obj, _keyPath, m);\n    } else {\n      watchKey(obj, _keyPath, m);\n    }\n  }\n\n  function isWatching(obj, key) {\n    return watcherCount(obj, key) > 0;\n  }\n\n  function watcherCount(obj, key) {\n    var meta$$1 = exports.peekMeta(obj);\n    return meta$$1 !== undefined && meta$$1.peekWatching(key) || 0;\n  }\n\n  function unwatch(obj, _keyPath, m) {\n    if (isPath(_keyPath)) {\n      unwatchPath(obj, _keyPath, m);\n    } else {\n      unwatchKey(obj, _keyPath, m);\n    }\n  }\n\n  // ..........................................................\n  // DEPENDENT KEYS\n  //\n\n  function addDependentKeys(desc, obj, keyName, meta) {\n    // the descriptor has a list of dependent keys, so\n    // add all of its dependent keys.\n    var depKeys = desc._dependentKeys;\n    if (depKeys === null || depKeys === undefined) {\n      return;\n    }\n\n    for (var idx = 0; idx < depKeys.length; idx++) {\n      var depKey = depKeys[idx];\n      // Increment the number of times depKey depends on keyName.\n      meta.writeDeps(depKey, keyName, (meta.peekDeps(depKey, keyName) || 0) + 1);\n      // Watch the depKey\n      watch(obj, depKey, meta);\n    }\n  }\n\n  function removeDependentKeys(desc, obj, keyName, meta) {\n    // the descriptor has a list of dependent keys, so\n    // remove all of its dependent keys.\n    var depKeys = desc._dependentKeys;\n    if (depKeys === null || depKeys === undefined) {\n      return;\n    }\n\n    for (var idx = 0; idx < depKeys.length; idx++) {\n      var depKey = depKeys[idx];\n      // Decrement the number of times depKey depends on keyName.\n      meta.writeDeps(depKey, keyName, (meta.peekDeps(depKey, keyName) || 0) - 1);\n      // Unwatch the depKey\n      unwatch(obj, depKey, meta);\n    }\n  }\n\n  /**\n  @module @ember/object\n  */\n\n  var DEEP_EACH_REGEX = /\\.@each\\.[^.]+\\./;\n\n  /**\n    A computed property transforms an object literal with object's accessor function(s) into a property.\n  \n    By default the function backing the computed property will only be called\n    once and the result will be cached. You can specify various properties\n    that your computed property depends on. This will force the cached\n    result to be recomputed if the dependencies are modified.\n  \n    In the following example we declare a computed property - `fullName` - by calling\n    `computed` with property dependencies (`firstName` and `lastName`) as leading arguments and getter accessor function. The `fullName` getter function\n    will be called once (regardless of how many times it is accessed) as long\n    as its dependencies have not changed. Once `firstName` or `lastName` are updated\n    any future calls (or anything bound) to `fullName` will incorporate the new\n    values.\n  \n    ```javascript\n    import EmberObject, { computed } from '@ember/object';\n  \n    let Person = EmberObject.extend({\n      // these will be supplied by `create`\n      firstName: null,\n      lastName: null,\n  \n      fullName: computed('firstName', 'lastName', function() {\n        let firstName = this.get('firstName'),\n            lastName  = this.get('lastName');\n  \n        return `${firstName} ${lastName}`;\n      })\n    });\n  \n    let tom = Person.create({\n      firstName: 'Tom',\n      lastName: 'Dale'\n    });\n  \n    tom.get('fullName') // 'Tom Dale'\n    ```\n  \n    You can also define what Ember should do when setting a computed property by providing additional function (`set`) in hash argument.\n    If you try to set a computed property, it will try to invoke setter accessor function with the key and\n    value you want to set it to as arguments.\n  \n    ```javascript\n    import EmberObject, { computed } from '@ember/object';\n  \n    let Person = EmberObject.extend({\n      // these will be supplied by `create`\n      firstName: null,\n      lastName: null,\n  \n      fullName: computed('firstName', 'lastName', {\n        get(key) {\n          let firstName = this.get('firstName'),\n              lastName  = this.get('lastName');\n  \n          return firstName + ' ' + lastName;\n        },\n        set(key, value) {\n          let [firstName, lastName] = value.split(' ');\n  \n          this.set('firstName', firstName);\n          this.set('lastName', lastName);\n  \n          return value;\n        }\n      })\n    });\n  \n    let person = Person.create();\n  \n    person.set('fullName', 'Peter Wagenet');\n    person.get('firstName'); // 'Peter'\n    person.get('lastName');  // 'Wagenet'\n    ```\n  \n    You can overwrite computed property with normal property (no longer computed), that won't change if dependencies change, if you set computed property and it won't have setter accessor function defined.\n  \n    You can also mark computed property as `.readOnly()` and block all attempts to set it.\n  \n    ```javascript\n    import EmberObject, { computed } from '@ember/object';\n  \n    let Person = EmberObject.extend({\n      // these will be supplied by `create`\n      firstName: null,\n      lastName: null,\n  \n      fullName: computed('firstName', 'lastName', {\n        get(key) {\n          let firstName = this.get('firstName');\n          let lastName  = this.get('lastName');\n  \n          return firstName + ' ' + lastName;\n        }\n      }).readOnly()\n    });\n  \n    let person = Person.create();\n    person.set('fullName', 'Peter Wagenet'); // Uncaught Error: Cannot set read-only property \"fullName\" on object: <(...):emberXXX>\n    ```\n  \n    Additional resources:\n    - [New CP syntax RFC](https://github.com/emberjs/rfcs/blob/master/text/0011-improved-cp-syntax.md)\n    - [New computed syntax explained in \"Ember 1.12 released\" ](https://emberjs.com/blog/2015/05/13/ember-1-12-released.html#toc_new-computed-syntax)\n  \n    @class ComputedProperty\n    @public\n  */\n  function ComputedProperty(config, opts) {\n    this.isDescriptor = true;\n    var hasGetterOnly = typeof config === 'function';\n    if (hasGetterOnly) {\n      this._getter = config;\n    } else {\n      true && !(typeof config === 'object' && !Array.isArray(config)) && emberDebug.assert('computed expects a function or an object as last argument.', typeof config === 'object' && !Array.isArray(config));\n      true && !Object.keys(config).every(function (key) {\n        return key === 'get' || key === 'set';\n      }) && emberDebug.assert('Config object passed to computed can only contain `get` or `set` keys.', Object.keys(config).every(function (key) {\n        return key === 'get' || key === 'set';\n      }));\n\n      this._getter = config.get;\n      this._setter = config.set;\n    }\n    true && !(!!this._getter || !!this._setter) && emberDebug.assert('Computed properties must receive a getter or a setter, you passed none.', !!this._getter || !!this._setter);\n\n    this._suspended = undefined;\n    this._meta = undefined;\n    this._volatile = false;\n\n    this._dependentKeys = opts && opts.dependentKeys;\n    this._readOnly = opts && hasGetterOnly && opts.readOnly === true;\n  }\n\n  ComputedProperty.prototype = new Descriptor();\n  ComputedProperty.prototype.constructor = ComputedProperty;\n\n  var ComputedPropertyPrototype = ComputedProperty.prototype;\n\n  /**\n    Call on a computed property to set it into non-cached mode. When in this\n    mode the computed property will not automatically cache the return value.\n  \n    It also does not automatically fire any change events. You must manually notify\n    any changes if you want to observe this property.\n  \n    Dependency keys have no effect on volatile properties as they are for cache\n    invalidation and notification when cached value is invalidated.\n  \n    ```javascript\n    import EmberObject, { computed } from '@ember/object';\n  \n    let outsideService = EmberObject.extend({\n      value: computed(function() {\n        return OutsideService.getValue();\n      }).volatile()\n    }).create();\n    ```\n  \n    @method volatile\n    @return {ComputedProperty} this\n    @chainable\n    @public\n  */\n  ComputedPropertyPrototype.volatile = function () {\n    this._volatile = true;\n    return this;\n  };\n\n  /**\n    Call on a computed property to set it into read-only mode. When in this\n    mode the computed property will throw an error when set.\n  \n    ```javascript\n    import EmberObject, { computed } from '@ember/object';\n  \n    let Person = EmberObject.extend({\n      guid: computed(function() {\n        return 'guid-guid-guid';\n      }).readOnly()\n    });\n  \n    let person = Person.create();\n  \n    person.set('guid', 'new-guid'); // will throw an exception\n    ```\n  \n    @method readOnly\n    @return {ComputedProperty} this\n    @chainable\n    @public\n  */\n  ComputedPropertyPrototype.readOnly = function () {\n    this._readOnly = true;\n    true && !!(this._readOnly && this._setter && this._setter !== this._getter) && emberDebug.assert('Computed properties that define a setter using the new syntax cannot be read-only', !(this._readOnly && this._setter && this._setter !== this._getter));\n\n    return this;\n  };\n\n  /**\n    Sets the dependent keys on this computed property. Pass any number of\n    arguments containing key paths that this computed property depends on.\n  \n    ```javascript\n    import EmberObject, { computed } from '@ember/object';\n  \n    let President = EmberObject.extend({\n      fullName: computed('firstName', 'lastName', function() {\n        return this.get('firstName') + ' ' + this.get('lastName');\n  \n        // Tell Ember that this computed property depends on firstName\n        // and lastName\n      })\n    });\n  \n    let president = President.create({\n      firstName: 'Barack',\n      lastName: 'Obama'\n    });\n  \n    president.get('fullName'); // 'Barack Obama'\n    ```\n  \n    @method property\n    @param {String} path* zero or more property paths\n    @return {ComputedProperty} this\n    @chainable\n    @public\n  */\n  ComputedPropertyPrototype.property = function () {\n    var args = [];\n\n    function addArg(property) {\n      true && emberDebug.warn('Dependent keys containing @each only work one level deep. ' + ('You used the key \"' + property + '\" which is invalid. ') + 'Please create an intermediary computed property.', DEEP_EACH_REGEX.test(property) === false, { id: 'ember-metal.computed-deep-each' });\n\n      args.push(property);\n    }\n\n    for (var i = 0; i < arguments.length; i++) {\n      expandProperties(arguments[i], addArg);\n    }\n\n    this._dependentKeys = args;\n    return this;\n  };\n\n  /**\n    In some cases, you may want to annotate computed properties with additional\n    metadata about how they function or what values they operate on. For example,\n    computed property functions may close over variables that are then no longer\n    available for introspection.\n  \n    You can pass a hash of these values to a computed property like this:\n  \n    ```\n    import { computed } from '@ember/object';\n    import Person from 'my-app/utils/person';\n  \n    person: computed(function() {\n      let personId = this.get('personId');\n      return Person.create({ id: personId });\n    }).meta({ type: Person })\n    ```\n  \n    The hash that you pass to the `meta()` function will be saved on the\n    computed property descriptor under the `_meta` key. Ember runtime\n    exposes a public API for retrieving these values from classes,\n    via the `metaForProperty()` function.\n  \n    @method meta\n    @param {Object} meta\n    @chainable\n    @public\n  */\n  ComputedPropertyPrototype.meta = function (meta$$1) {\n    if (arguments.length === 0) {\n      return this._meta || {};\n    } else {\n      this._meta = meta$$1;\n      return this;\n    }\n  };\n\n  // invalidate cache when CP key changes\n  ComputedPropertyPrototype.didChange = function (obj, keyName) {\n    // _suspended is set via a CP.set to ensure we don't clear\n    // the cached value set by the setter\n    if (this._volatile || this._suspended === obj) {\n      return;\n    }\n\n    // don't create objects just to invalidate\n    var meta$$1 = exports.peekMeta(obj);\n    if (meta$$1 === undefined || meta$$1.source !== obj) {\n      return;\n    }\n\n    var cache = meta$$1.readableCache();\n    if (cache !== undefined && cache[keyName] !== undefined) {\n      cache[keyName] = undefined;\n      removeDependentKeys(this, obj, keyName, meta$$1);\n    }\n  };\n\n  ComputedPropertyPrototype.get = function (obj, keyName) {\n    if (this._volatile) {\n      return this._getter.call(obj, keyName);\n    }\n\n    var meta$$1 = meta(obj);\n    var cache = meta$$1.writableCache();\n\n    var result = cache[keyName];\n    if (result === UNDEFINED) {\n      return undefined;\n    } else if (result !== undefined) {\n      return result;\n    }\n\n    var ret = this._getter.call(obj, keyName);\n\n    cache[keyName] = ret === undefined ? UNDEFINED : ret;\n\n    var chainWatchers = meta$$1.readableChainWatchers();\n    if (chainWatchers !== undefined) {\n      chainWatchers.revalidate(keyName);\n    }\n    addDependentKeys(this, obj, keyName, meta$$1);\n\n    return ret;\n  };\n\n  ComputedPropertyPrototype.set = function computedPropertySetEntry(obj, keyName, value) {\n    if (this._readOnly) {\n      this._throwReadOnlyError(obj, keyName);\n    }\n\n    if (!this._setter) {\n      return this.clobberSet(obj, keyName, value);\n    }\n\n    if (this._volatile) {\n      return this.volatileSet(obj, keyName, value);\n    }\n\n    return this.setWithSuspend(obj, keyName, value);\n  };\n\n  ComputedPropertyPrototype._throwReadOnlyError = function computedPropertyThrowReadOnlyError(obj, keyName) {\n    throw new emberDebug.Error('Cannot set read-only property \"' + keyName + '\" on object: ' + emberUtils.inspect(obj));\n  };\n\n  ComputedPropertyPrototype.clobberSet = function computedPropertyClobberSet(obj, keyName, value) {\n    var cachedValue = cacheFor(obj, keyName);\n    defineProperty(obj, keyName, null, cachedValue);\n    set(obj, keyName, value);\n    return value;\n  };\n\n  ComputedPropertyPrototype.volatileSet = function computedPropertyVolatileSet(obj, keyName, value) {\n    return this._setter.call(obj, keyName, value);\n  };\n\n  ComputedPropertyPrototype.setWithSuspend = function computedPropertySetWithSuspend(obj, keyName, value) {\n    var oldSuspended = this._suspended;\n    this._suspended = obj;\n    try {\n      return this._set(obj, keyName, value);\n    } finally {\n      this._suspended = oldSuspended;\n    }\n  };\n\n  ComputedPropertyPrototype._set = function computedPropertySet(obj, keyName, value) {\n    var meta$$1 = meta(obj);\n    var cache = meta$$1.writableCache();\n\n    var val = cache[keyName];\n    var hadCachedValue = val !== undefined;\n\n    var cachedValue = void 0;\n    if (hadCachedValue && val !== UNDEFINED) {\n      cachedValue = val;\n    }\n\n    var ret = this._setter.call(obj, keyName, value, cachedValue);\n\n    // allows setter to return the same value that is cached already\n    if (hadCachedValue && cachedValue === ret) {\n      return ret;\n    }\n\n    propertyWillChange(obj, keyName, meta$$1);\n\n    if (!hadCachedValue) {\n      addDependentKeys(this, obj, keyName, meta$$1);\n    }\n\n    cache[keyName] = ret === undefined ? UNDEFINED : ret;\n\n    propertyDidChange(obj, keyName, meta$$1);\n\n    return ret;\n  };\n\n  /* called before property is overridden */\n  ComputedPropertyPrototype.teardown = function (obj, keyName, meta$$1) {\n    if (this._volatile) {\n      return;\n    }\n    var cache = meta$$1.readableCache();\n    if (cache !== undefined && cache[keyName] !== undefined) {\n      removeDependentKeys(this, obj, keyName, meta$$1);\n      cache[keyName] = undefined;\n    }\n  };\n\n  /**\n    This helper returns a new property descriptor that wraps the passed\n    computed property function. You can use this helper to define properties\n    with mixins or via `defineProperty()`.\n  \n    If you pass a function as an argument, it will be used as a getter. A computed\n    property defined in this way might look like this:\n  \n    ```js\n    import EmberObject, { computed } from '@ember/object';\n  \n    let Person = EmberObject.extend({\n      init() {\n        this._super(...arguments);\n  \n        this.firstName = 'Betty';\n        this.lastName = 'Jones';\n      },\n  \n      fullName: computed('firstName', 'lastName', function() {\n        return `${this.get('firstName')} ${this.get('lastName')}`;\n      })\n    });\n  \n    let client = Person.create();\n  \n    client.get('fullName'); // 'Betty Jones'\n  \n    client.set('lastName', 'Fuller');\n    client.get('fullName'); // 'Betty Fuller'\n    ```\n  \n    You can pass a hash with two functions, `get` and `set`, as an\n    argument to provide both a getter and setter:\n  \n    ```js\n    import EmberObject, { computed } from '@ember/object';\n  \n    let Person = EmberObject.extend({\n      init() {\n        this._super(...arguments);\n  \n        this.firstName = 'Betty';\n        this.lastName = 'Jones';\n      },\n  \n      fullName: computed('firstName', 'lastName', {\n        get(key) {\n          return `${this.get('firstName')} ${this.get('lastName')}`;\n        },\n        set(key, value) {\n          let [firstName, lastName] = value.split(/\\s+/);\n          this.setProperties({ firstName, lastName });\n          return value;\n        }\n      })\n    });\n  \n    let client = Person.create();\n    client.get('firstName'); // 'Betty'\n  \n    client.set('fullName', 'Carroll Fuller');\n    client.get('firstName'); // 'Carroll'\n    ```\n  \n    The `set` function should accept two parameters, `key` and `value`. The value\n    returned from `set` will be the new value of the property.\n  \n    _Note: This is the preferred way to define computed properties when writing third-party\n    libraries that depend on or use Ember, since there is no guarantee that the user\n    will have [prototype Extensions](https://emberjs.com/guides/configuring-ember/disabling-prototype-extensions/) enabled._\n  \n    The alternative syntax, with prototype extensions, might look like:\n  \n    ```js\n    fullName: function() {\n      return this.get('firstName') + ' ' + this.get('lastName');\n    }.property('firstName', 'lastName')\n    ```\n  \n    @method computed\n    @for @ember/object\n    @static\n    @param {String} [dependentKeys*] Optional dependent keys that trigger this computed property.\n    @param {Function} func The computed property function.\n    @return {ComputedProperty} property descriptor instance\n    @public\n  */\n  function computed() {\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var func = args.pop();\n\n    var cp = new ComputedProperty(func);\n\n    if (args.length > 0) {\n      cp.property.apply(cp, args);\n    }\n\n    return cp;\n  }\n\n  /**\n    Returns the cached value for a property, if one exists.\n    This can be useful for peeking at the value of a computed\n    property that is generated lazily, without accidentally causing\n    it to be created.\n  \n    @method cacheFor\n    @static\n    @for @ember/object/internals\n    @param {Object} obj the object whose property you want to check\n    @param {String} key the name of the property whose cached value you want\n      to return\n    @return {Object} the cached value\n    @public\n  */\n  function cacheFor(obj, key) {\n    var meta$$1 = exports.peekMeta(obj);\n    var cache = meta$$1 !== undefined ? meta$$1.source === obj && meta$$1.readableCache() : undefined;\n    var ret = cache !== undefined ? cache[key] : undefined;\n\n    if (ret === UNDEFINED) {\n      return undefined;\n    }\n    return ret;\n  }\n\n  cacheFor.set = function (cache, key, value) {\n    if (value === undefined) {\n      cache[key] = UNDEFINED;\n    } else {\n      cache[key] = value;\n    }\n  };\n\n  cacheFor.get = function (cache, key) {\n    var ret = cache[key];\n    if (ret === UNDEFINED) {\n      return undefined;\n    }\n    return ret;\n  };\n\n  cacheFor.remove = function (cache, key) {\n    cache[key] = undefined;\n  };\n\n  var CONSUMED = {};\n\n  function alias(altKey) {\n    return new AliasedProperty(altKey);\n  }\n\n  var AliasedProperty = function (_Descriptor) {\n    emberBabel.inherits(AliasedProperty, _Descriptor);\n\n    function AliasedProperty(altKey) {\n      emberBabel.classCallCheck(this, AliasedProperty);\n\n      var _this = emberBabel.possibleConstructorReturn(this, _Descriptor.call(this));\n\n      _this.isDescriptor = true;\n      _this.altKey = altKey;\n      _this._dependentKeys = [altKey];\n      return _this;\n    }\n\n    AliasedProperty.prototype.setup = function setup(obj, keyName) {\n      true && !(this.altKey !== keyName) && emberDebug.assert('Setting alias \\'' + keyName + '\\' on self', this.altKey !== keyName);\n\n      var meta$$1 = meta(obj);\n      if (meta$$1.peekWatching(keyName)) {\n        addDependentKeys(this, obj, keyName, meta$$1);\n      }\n    };\n\n    AliasedProperty.prototype.teardown = function teardown(obj, keyName, meta$$1) {\n      if (meta$$1.peekWatching(keyName)) {\n        removeDependentKeys(this, obj, keyName, meta$$1);\n      }\n    };\n\n    AliasedProperty.prototype.willWatch = function willWatch(obj, keyName, meta$$1) {\n      addDependentKeys(this, obj, keyName, meta$$1);\n    };\n\n    AliasedProperty.prototype.didUnwatch = function didUnwatch(obj, keyName, meta$$1) {\n      removeDependentKeys(this, obj, keyName, meta$$1);\n    };\n\n    AliasedProperty.prototype.get = function get$$1(obj, keyName) {\n      var ret = get(obj, this.altKey);\n      var meta$$1 = meta(obj);\n      var cache = meta$$1.writableCache();\n      if (cache[keyName] !== CONSUMED) {\n        cache[keyName] = CONSUMED;\n        addDependentKeys(this, obj, keyName, meta$$1);\n      }\n      return ret;\n    };\n\n    AliasedProperty.prototype.set = function set$$1(obj, keyName, value) {\n      return set(obj, this.altKey, value);\n    };\n\n    AliasedProperty.prototype.readOnly = function readOnly() {\n      this.set = AliasedProperty_readOnlySet;\n      return this;\n    };\n\n    AliasedProperty.prototype.oneWay = function oneWay() {\n      this.set = AliasedProperty_oneWaySet;\n      return this;\n    };\n\n    return AliasedProperty;\n  }(Descriptor);\n\n  function AliasedProperty_readOnlySet(obj, keyName, value) {\n    throw new emberDebug.Error('Cannot set read-only property \\'' + keyName + '\\' on object: ' + emberUtils.inspect(obj));\n  }\n\n  function AliasedProperty_oneWaySet(obj, keyName, value) {\n    defineProperty(obj, keyName, null);\n    return set(obj, keyName, value);\n  }\n\n  // Backwards compatibility with Ember Data.\n  AliasedProperty.prototype._meta = undefined;\n  AliasedProperty.prototype.meta = ComputedProperty.prototype.meta;\n\n  /**\n   @module @ember/polyfills\n  */\n  /**\n    Merge the contents of two objects together into the first object.\n  \n    ```javascript\n    import { merge } from '@ember/polyfills';\n  \n    merge({ first: 'Tom' }, { last: 'Dale' }); // { first: 'Tom', last: 'Dale' }\n    var a = { first: 'Yehuda' };\n    var b = { last: 'Katz' };\n    merge(a, b); // a == { first: 'Yehuda', last: 'Katz' }, b == { last: 'Katz' }\n    ```\n  \n    @method merge\n    @static\n    @for @ember/polyfills\n    @param {Object} original The object to merge into\n    @param {Object} updates The object to copy properties from\n    @return {Object}\n    @public\n  */\n  function merge(original, updates) {\n    if (updates === null || typeof updates !== 'object') {\n      return original;\n    }\n\n    var props = Object.keys(updates);\n    var prop = void 0;\n\n    for (var i = 0; i < props.length; i++) {\n      prop = props[i];\n      original[prop] = updates[prop];\n    }\n\n    return original;\n  }\n\n  /**\n  @module ember\n  */\n\n  /**\n    Used internally to allow changing properties in a backwards compatible way, and print a helpful\n    deprecation warning.\n  \n    @method deprecateProperty\n    @param {Object} object The object to add the deprecated property to.\n    @param {String} deprecatedKey The property to add (and print deprecation warnings upon accessing).\n    @param {String} newKey The property that will be aliased.\n    @private\n    @since 1.7.0\n  */\n\n  function deprecateProperty(object, deprecatedKey, newKey, options) {\n    function _deprecate() {\n      true && !false && emberDebug.deprecate('Usage of `' + deprecatedKey + '` is deprecated, use `' + newKey + '` instead.', false, options);\n    }\n\n    Object.defineProperty(object, deprecatedKey, {\n      configurable: true,\n      enumerable: false,\n      set: function (value) {\n        _deprecate();\n        set(this, newKey, value);\n      },\n      get: function () {\n        _deprecate();\n        return get(this, newKey);\n      }\n    });\n  }\n\n  /* eslint no-console:off */\n  /* global console */\n\n  /**\n  @module @ember/instrumentation\n  @private\n  */\n\n  /**\n    The purpose of the Ember Instrumentation module is\n    to provide efficient, general-purpose instrumentation\n    for Ember.\n  \n    Subscribe to a listener by using `subscribe`:\n  \n    ```javascript\n    import { subscribe } from '@ember/instrumentation';\n  \n    subscribe(\"render\", {\n      before(name, timestamp, payload) {\n  \n      },\n  \n      after(name, timestamp, payload) {\n  \n      }\n    });\n    ```\n  \n    If you return a value from the `before` callback, that same\n    value will be passed as a fourth parameter to the `after`\n    callback.\n  \n    Instrument a block of code by using `instrument`:\n  \n    ```javascript\n    import { instrument } from '@ember/instrumentation';\n  \n    instrument(\"render.handlebars\", payload, function() {\n      // rendering logic\n    }, binding);\n    ```\n  \n    Event names passed to `instrument` are namespaced\n    by periods, from more general to more specific. Subscribers\n    can listen for events by whatever level of granularity they\n    are interested in.\n  \n    In the above example, the event is `render.handlebars`,\n    and the subscriber listened for all events beginning with\n    `render`. It would receive callbacks for events named\n    `render`, `render.handlebars`, `render.container`, or\n    even `render.handlebars.layout`.\n  \n    @class Instrumentation\n    @static\n    @private\n  */\n  var subscribers = [];\n  var cache = {};\n\n  function populateListeners(name) {\n    var listeners = [];\n    var subscriber = void 0;\n\n    for (var i = 0; i < subscribers.length; i++) {\n      subscriber = subscribers[i];\n      if (subscriber.regex.test(name)) {\n        listeners.push(subscriber.object);\n      }\n    }\n\n    cache[name] = listeners;\n    return listeners;\n  }\n\n  var time = function () {\n    var perf = 'undefined' !== typeof window ? window.performance || {} : {};\n    var fn = perf.now || perf.mozNow || perf.webkitNow || perf.msNow || perf.oNow;\n    // fn.bind will be available in all the browsers that support the advanced window.performance... ;-)\n    return fn ? fn.bind(perf) : function () {\n      return +new Date();\n    };\n  }();\n\n  /**\n    Notifies event's subscribers, calls `before` and `after` hooks.\n  \n    @method instrument\n    @for @ember/instrumentation\n    @static\n    @param {String} [name] Namespaced event name.\n    @param {Object} _payload\n    @param {Function} callback Function that you're instrumenting.\n    @param {Object} binding Context that instrument function is called with.\n    @private\n  */\n  function instrument(name, _payload, callback, binding) {\n    if (arguments.length <= 3 && typeof _payload === 'function') {\n      binding = callback;\n      callback = _payload;\n      _payload = undefined;\n    }\n    if (subscribers.length === 0) {\n      return callback.call(binding);\n    }\n    var payload = _payload || {};\n    var finalizer = _instrumentStart(name, function () {\n      return payload;\n    });\n\n    if (finalizer) {\n      return withFinalizer(callback, finalizer, payload, binding);\n    } else {\n      return callback.call(binding);\n    }\n  }\n\n  exports.flaggedInstrument = void 0;\n  if (ember_features.EMBER_IMPROVED_INSTRUMENTATION) {\n    exports.flaggedInstrument = instrument;\n  } else {\n    exports.flaggedInstrument = function (name, payload, callback) {\n      return callback();\n    };\n  }\n  function withFinalizer(callback, finalizer, payload, binding) {\n    var result = void 0;\n    try {\n      result = callback.call(binding);\n    } catch (e) {\n      payload.exception = e;\n      result = payload;\n    } finally {\n      finalizer();\n    }\n    return result;\n  }\n\n  function NOOP() {}\n\n  // private for now\n  function _instrumentStart(name, _payload, _payloadParam) {\n    if (subscribers.length === 0) {\n      return NOOP;\n    }\n\n    var listeners = cache[name];\n\n    if (!listeners) {\n      listeners = populateListeners(name);\n    }\n\n    if (listeners.length === 0) {\n      return NOOP;\n    }\n\n    var payload = _payload(_payloadParam);\n\n    var STRUCTURED_PROFILE = emberEnvironment.ENV.STRUCTURED_PROFILE;\n    var timeName = void 0;\n    if (STRUCTURED_PROFILE) {\n      timeName = name + ': ' + payload.object;\n      console.time(timeName);\n    }\n\n    var beforeValues = new Array(listeners.length);\n    var i = void 0,\n        listener = void 0;\n    var timestamp = time();\n    for (i = 0; i < listeners.length; i++) {\n      listener = listeners[i];\n      beforeValues[i] = listener.before(name, timestamp, payload);\n    }\n\n    return function _instrumentEnd() {\n      var i = void 0,\n          listener = void 0;\n      var timestamp = time();\n      for (i = 0; i < listeners.length; i++) {\n        listener = listeners[i];\n        if (typeof listener.after === 'function') {\n          listener.after(name, timestamp, payload, beforeValues[i]);\n        }\n      }\n\n      if (STRUCTURED_PROFILE) {\n        console.timeEnd(timeName);\n      }\n    };\n  }\n\n  /**\n    Subscribes to a particular event or instrumented block of code.\n  \n    @method subscribe\n    @for @ember/instrumentation\n    @static\n  \n    @param {String} [pattern] Namespaced event name.\n    @param {Object} [object] Before and After hooks.\n  \n    @return {Subscriber}\n    @private\n  */\n  function subscribe(pattern, object) {\n    var paths = pattern.split('.');\n    var path = void 0;\n    var regex = [];\n\n    for (var i = 0; i < paths.length; i++) {\n      path = paths[i];\n      if (path === '*') {\n        regex.push('[^\\\\.]*');\n      } else {\n        regex.push(path);\n      }\n    }\n\n    regex = regex.join('\\\\.');\n    regex = regex + '(\\\\..*)?';\n\n    var subscriber = {\n      pattern: pattern,\n      regex: new RegExp('^' + regex + '$'),\n      object: object\n    };\n\n    subscribers.push(subscriber);\n    cache = {};\n\n    return subscriber;\n  }\n\n  /**\n    Unsubscribes from a particular event or instrumented block of code.\n  \n    @method unsubscribe\n    @for @ember/instrumentation\n    @static\n  \n    @param {Object} [subscriber]\n    @private\n  */\n  function unsubscribe(subscriber) {\n    var index = void 0;\n\n    for (var i = 0; i < subscribers.length; i++) {\n      if (subscribers[i] === subscriber) {\n        index = i;\n      }\n    }\n\n    subscribers.splice(index, 1);\n    cache = {};\n  }\n\n  /**\n    Resets `Instrumentation` by flushing list of subscribers.\n  \n    @method reset\n    @for @ember/instrumentation\n    @static\n    @private\n  */\n  function reset() {\n    subscribers.length = 0;\n    cache = {};\n  }\n\n  var onerror = void 0;\n  var onErrorTarget = {\n    get onerror() {\n      return onerror;\n    }\n  };\n\n  // Ember.onerror getter\n  function getOnerror() {\n    return onerror;\n  }\n  // Ember.onerror setter\n  function setOnerror(handler) {\n    onerror = handler;\n  }\n\n  var dispatchOverride = void 0;\n\n  // allows testing adapter to override dispatch\n  function getDispatchOverride() {\n    return dispatchOverride;\n  }\n  function setDispatchOverride(handler) {\n    dispatchOverride = handler;\n  }\n\n  /**\n   @module @ember/utils\n  */\n  /**\n    Returns true if the passed value is null or undefined. This avoids errors\n    from JSLint complaining about use of ==, which can be technically\n    confusing.\n  \n    ```javascript\n    isNone();              // true\n    isNone(null);          // true\n    isNone(undefined);     // true\n    isNone('');            // false\n    isNone([]);            // false\n    isNone(function() {}); // false\n    ```\n  \n    @method isNone\n    @static\n    @for @ember/utils\n    @param {Object} obj Value to test\n    @return {Boolean}\n    @public\n  */\n  function isNone(obj) {\n    return obj === null || obj === undefined;\n  }\n\n  /**\n   @module @ember/utils\n  */\n  /**\n    Verifies that a value is `null` or `undefined`, an empty string, or an empty\n    array.\n  \n    Constrains the rules on `isNone` by returning true for empty strings and\n    empty arrays.\n  \n    ```javascript\n    isEmpty();                // true\n    isEmpty(null);            // true\n    isEmpty(undefined);       // true\n    isEmpty('');              // true\n    isEmpty([]);              // true\n    isEmpty({});              // false\n    isEmpty('Adam Hawkins');  // false\n    isEmpty([0,1,2]);         // false\n    isEmpty('\\n\\t');          // false\n    isEmpty('  ');            // false\n    ```\n  \n    @method isEmpty\n    @static\n    @for @ember/utils\n    @param {Object} obj Value to test\n    @return {Boolean}\n    @public\n  */\n  function isEmpty(obj) {\n    var none = isNone(obj);\n    if (none) {\n      return none;\n    }\n\n    if (typeof obj.size === 'number') {\n      return !obj.size;\n    }\n\n    var objectType = typeof obj;\n\n    if (objectType === 'object') {\n      var size = get(obj, 'size');\n      if (typeof size === 'number') {\n        return !size;\n      }\n    }\n\n    if (typeof obj.length === 'number' && objectType !== 'function') {\n      return !obj.length;\n    }\n\n    if (objectType === 'object') {\n      var length = get(obj, 'length');\n      if (typeof length === 'number') {\n        return !length;\n      }\n    }\n\n    return false;\n  }\n\n  /**\n   @module @ember/utils\n  */\n  /**\n    A value is blank if it is empty or a whitespace string.\n  \n    ```javascript\n    import { isBlank } from '@ember/utils';\n  \n    isBlank();                // true\n    isBlank(null);            // true\n    isBlank(undefined);       // true\n    isBlank('');              // true\n    isBlank([]);              // true\n    isBlank('\\n\\t');          // true\n    isBlank('  ');            // true\n    isBlank({});              // false\n    isBlank('\\n\\t Hello');    // false\n    isBlank('Hello world');   // false\n    isBlank([1,2,3]);         // false\n    ```\n  \n    @method isBlank\n    @static\n    @for @ember/utils\n    @param {Object} obj Value to test\n    @return {Boolean}\n    @since 1.5.0\n    @public\n  */\n  function isBlank(obj) {\n    return isEmpty(obj) || typeof obj === 'string' && /\\S/.test(obj) === false;\n  }\n\n  /**\n   @module @ember/utils\n  */\n  /**\n    A value is present if it not `isBlank`.\n  \n    ```javascript\n    isPresent();                // false\n    isPresent(null);            // false\n    isPresent(undefined);       // false\n    isPresent('');              // false\n    isPresent('  ');            // false\n    isPresent('\\n\\t');          // false\n    isPresent([]);              // false\n    isPresent({ length: 0 })    // false\n    isPresent(false);           // true\n    isPresent(true);            // true\n    isPresent('string');        // true\n    isPresent(0);               // true\n    isPresent(function() {})    // true\n    isPresent({});              // true\n    isPresent(false);           // true\n    isPresent('\\n\\t Hello');    // true\n    isPresent([1,2,3]);         // true\n    ```\n  \n    @method isPresent\n    @static\n    @for @ember/utils\n    @param {Object} obj Value to test\n    @return {Boolean}\n    @since 1.8.0\n    @public\n  */\n  function isPresent(obj) {\n    return !isBlank(obj);\n  }\n\n  function onBegin(current) {\n    run.currentRunLoop = current;\n  }\n\n  function onEnd(current, next) {\n    run.currentRunLoop = next;\n  }\n\n  var backburner$1 = new Backburner(['sync', 'actions', 'destroy'], {\n    GUID_KEY: emberUtils.GUID_KEY,\n    sync: {\n      before: beginPropertyChanges,\n      after: endPropertyChanges\n    },\n    defaultQueue: 'actions',\n    onBegin: onBegin,\n    onEnd: onEnd,\n    onErrorTarget: onErrorTarget,\n    onErrorMethod: 'onerror'\n  });\n\n  /**\n   @module @ember/runloop\n  */\n  // ..........................................................\n  // run - this is ideally the only public API the dev sees\n  //\n\n  /**\n    Runs the passed target and method inside of a RunLoop, ensuring any\n    deferred actions including bindings and views updates are flushed at the\n    end.\n  \n    Normally you should not need to invoke this method yourself. However if\n    you are implementing raw event handlers when interfacing with other\n    libraries or plugins, you should probably wrap all of your code inside this\n    call.\n  \n    ```javascript\n    import { run } from '@ember/runloop';\n  \n    run(function() {\n      // code to be executed within a RunLoop\n    });\n    ```\n    @method run\n    @for @ember/runloop\n    @static\n    @param {Object} [target] target of method to call\n    @param {Function|String} method Method to invoke.\n      May be a function or a string. If you pass a string\n      then it will be looked up on the passed target.\n    @param {Object} [args*] Any additional arguments you wish to pass to the method.\n    @return {Object} return value from invoking the passed function.\n    @public\n  */\n  function run() {\n    return backburner$1.run.apply(backburner$1, arguments);\n  }\n\n  /**\n    If no run-loop is present, it creates a new one. If a run loop is\n    present it will queue itself to run on the existing run-loops action\n    queue.\n  \n    Please note: This is not for normal usage, and should be used sparingly.\n  \n    If invoked when not within a run loop:\n  \n    ```javascript\n    import { join } from '@ember/runloop';\n  \n    join(function() {\n      // creates a new run-loop\n    });\n    ```\n  \n    Alternatively, if called within an existing run loop:\n  \n    ```javascript\n    import { run, join } from '@ember/runloop';\n  \n    run(function() {\n      // creates a new run-loop\n  \n      join(function() {\n        // joins with the existing run-loop, and queues for invocation on\n        // the existing run-loops action queue.\n      });\n    });\n    ```\n  \n    @method join\n    @static\n    @for @ember/runloop\n    @param {Object} [target] target of method to call\n    @param {Function|String} method Method to invoke.\n      May be a function or a string. If you pass a string\n      then it will be looked up on the passed target.\n    @param {Object} [args*] Any additional arguments you wish to pass to the method.\n    @return {Object} Return value from invoking the passed function. Please note,\n    when called within an existing loop, no return value is possible.\n    @public\n  */\n  run.join = function () {\n    return backburner$1.join.apply(backburner$1, arguments);\n  };\n\n  /**\n    Allows you to specify which context to call the specified function in while\n    adding the execution of that function to the Ember run loop. This ability\n    makes this method a great way to asynchronously integrate third-party libraries\n    into your Ember application.\n  \n    `bind` takes two main arguments, the desired context and the function to\n    invoke in that context. Any additional arguments will be supplied as arguments\n    to the function that is passed in.\n  \n    Let's use the creation of a TinyMCE component as an example. Currently,\n    TinyMCE provides a setup configuration option we can use to do some processing\n    after the TinyMCE instance is initialized but before it is actually rendered.\n    We can use that setup option to do some additional setup for our component.\n    The component itself could look something like the following:\n  \n    ```app/components/rich-text-editor.js\n    import Component from '@ember/component';\n    import { on } from '@ember/object/evented';\n    import { bind } from '@ember/runloop';\n  \n    export default Component.extend({\n      initializeTinyMCE: on('didInsertElement', function() {\n        tinymce.init({\n          selector: '#' + this.$().prop('id'),\n          setup: Ember.run.bind(this, this.setupEditor)\n        });\n      }),\n      \n      didInsertElement() {\n        tinymce.init({\n          selector: '#' + this.$().prop('id'),\n          setup: Ember.run.bind(this, this.setupEditor)\n        });\n      }\n  \n      setupEditor(editor) {\n        this.set('editor', editor);\n  \n        editor.on('change', function() {\n          console.log('content changed!');\n        });\n      }\n    });\n    ```\n  \n    In this example, we use Ember.run.bind to bind the setupEditor method to the\n    context of the RichTextEditor component and to have the invocation of that\n    method be safely handled and executed by the Ember run loop.\n  \n    @method bind\n    @static\n    @for @ember/runloop\n    @param {Object} [target] target of method to call\n    @param {Function|String} method Method to invoke.\n      May be a function or a string. If you pass a string\n      then it will be looked up on the passed target.\n    @param {Object} [args*] Any additional arguments you wish to pass to the method.\n    @return {Function} returns a new function that will always have a particular context\n    @since 1.4.0\n    @public\n  */\n  run.bind = function () {\n    for (var _len = arguments.length, curried = Array(_len), _key = 0; _key < _len; _key++) {\n      curried[_key] = arguments[_key];\n    }\n\n    return function () {\n      for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n        args[_key2] = arguments[_key2];\n      }\n\n      return run.join.apply(run, curried.concat(args));\n    };\n  };\n\n  run.backburner = backburner$1;\n  run.currentRunLoop = null;\n  run.queues = backburner$1.queueNames;\n\n  /**\n    Begins a new RunLoop. Any deferred actions invoked after the begin will\n    be buffered until you invoke a matching call to `run.end()`. This is\n    a lower-level way to use a RunLoop instead of using `run()`.\n  \n    ```javascript\n    import { begin, end } from '@ember/runloop';\n  \n    begin();\n    // code to be executed within a RunLoop\n    end();\n    ```\n  \n    @method begin\n    @static\n    @for @ember/runloop\n    @return {void}\n    @public\n  */\n  run.begin = function () {\n    backburner$1.begin();\n  };\n\n  /**\n    Ends a RunLoop. This must be called sometime after you call\n    `run.begin()` to flush any deferred actions. This is a lower-level way\n    to use a RunLoop instead of using `run()`.\n  \n    ```javascript\n    import { begin, end } from '@ember/runloop';\n  \n    begin();\n    // code to be executed within a RunLoop\n    end();\n    ```\n  \n    @method end\n    @static\n    @for @ember/runloop\n    @return {void}\n    @public\n  */\n  run.end = function () {\n    backburner$1.end();\n  };\n\n  /**\n    Array of named queues. This array determines the order in which queues\n    are flushed at the end of the RunLoop. You can define your own queues by\n    simply adding the queue name to this array. Normally you should not need\n    to inspect or modify this property.\n  \n    @property queues\n    @type Array\n    @default ['sync', 'actions', 'destroy']\n    @private\n  */\n\n  /**\n    Adds the passed target/method and any optional arguments to the named\n    queue to be executed at the end of the RunLoop. If you have not already\n    started a RunLoop when calling this method one will be started for you\n    automatically.\n  \n    At the end of a RunLoop, any methods scheduled in this way will be invoked.\n    Methods will be invoked in an order matching the named queues defined in\n    the `run.queues` property.\n  \n    ```javascript\n    import { schedule } from '@ember/runloop';\n  \n    schedule('sync', this, function() {\n      // this will be executed in the first RunLoop queue, when bindings are synced\n      console.log('scheduled on sync queue');\n    });\n  \n    schedule('actions', this, function() {\n      // this will be executed in the 'actions' queue, after bindings have synced.\n      console.log('scheduled on actions queue');\n    });\n  \n    // Note the functions will be run in order based on the run queues order.\n    // Output would be:\n    //   scheduled on sync queue\n    //   scheduled on actions queue\n    ```\n  \n    @method schedule\n    @static\n    @for @ember/runloop\n    @param {String} queue The name of the queue to schedule against.\n      Default queues are 'sync' and 'actions'\n    @param {Object} [target] target object to use as the context when invoking a method.\n    @param {String|Function} method The method to invoke. If you pass a string it\n      will be resolved on the target object at the time the scheduled item is\n      invoked allowing you to change the target function.\n    @param {Object} [arguments*] Optional arguments to be passed to the queued method.\n    @return {*} Timer information for use in canceling, see `run.cancel`.\n    @public\n  */\n  run.schedule = function () /* queue, target, method */{\n    true && !(run.currentRunLoop || !emberDebug.isTesting()) && emberDebug.assert('You have turned on testing mode, which disabled the run-loop\\'s autorun. ' + 'You will need to wrap any code with asynchronous side-effects in a run', run.currentRunLoop || !emberDebug.isTesting());\n\n    return backburner$1.schedule.apply(backburner$1, arguments);\n  };\n\n  // Used by global test teardown\n  run.hasScheduledTimers = function () {\n    return backburner$1.hasTimers();\n  };\n\n  // Used by global test teardown\n  run.cancelTimers = function () {\n    backburner$1.cancelTimers();\n  };\n\n  /**\n    Immediately flushes any events scheduled in the 'sync' queue. Bindings\n    use this queue so this method is a useful way to immediately force all\n    bindings in the application to sync.\n  \n    You should call this method anytime you need any changed state to propagate\n    throughout the app immediately without repainting the UI (which happens\n    in the later 'render' queue added by the `ember-views` package).\n  \n    ```javascript\n    run.sync();\n    ```\n  \n    @method sync\n    @static\n    @for @ember/runloop\n    @return {void}\n    @private\n  */\n  run.sync = function () {\n    if (backburner$1.currentInstance) {\n      backburner$1.currentInstance.queues.sync.flush();\n    }\n  };\n\n  /**\n    Invokes the passed target/method and optional arguments after a specified\n    period of time. The last parameter of this method must always be a number\n    of milliseconds.\n  \n    You should use this method whenever you need to run some action after a\n    period of time instead of using `setTimeout()`. This method will ensure that\n    items that expire during the same script execution cycle all execute\n    together, which is often more efficient than using a real setTimeout.\n  \n    ```javascript\n    import { later } from '@ember/runloop';\n  \n    later(myContext, function() {\n      // code here will execute within a RunLoop in about 500ms with this == myContext\n    }, 500);\n    ```\n  \n    @method later\n    @static\n    @for @ember/runloop\n    @param {Object} [target] target of method to invoke\n    @param {Function|String} method The method to invoke.\n      If you pass a string it will be resolved on the\n      target at the time the method is invoked.\n    @param {Object} [args*] Optional arguments to pass to the timeout.\n    @param {Number} wait Number of milliseconds to wait.\n    @return {*} Timer information for use in canceling, see `run.cancel`.\n    @public\n  */\n  run.later = function () /*target, method*/{\n    return backburner$1.later.apply(backburner$1, arguments);\n  };\n\n  /**\n    Schedule a function to run one time during the current RunLoop. This is equivalent\n    to calling `scheduleOnce` with the \"actions\" queue.\n  \n    @method once\n    @static\n    @for @ember/runloop\n    @param {Object} [target] The target of the method to invoke.\n    @param {Function|String} method The method to invoke.\n      If you pass a string it will be resolved on the\n      target at the time the method is invoked.\n    @param {Object} [args*] Optional arguments to pass to the timeout.\n    @return {Object} Timer information for use in canceling, see `run.cancel`.\n    @public\n  */\n  run.once = function () {\n    true && !(run.currentRunLoop || !emberDebug.isTesting()) && emberDebug.assert('You have turned on testing mode, which disabled the run-loop\\'s autorun. ' + 'You will need to wrap any code with asynchronous side-effects in a run', run.currentRunLoop || !emberDebug.isTesting());\n\n    for (var _len3 = arguments.length, args = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n      args[_key3] = arguments[_key3];\n    }\n\n    args.unshift('actions');\n    return backburner$1.scheduleOnce.apply(backburner$1, args);\n  };\n\n  /**\n    Schedules a function to run one time in a given queue of the current RunLoop.\n    Calling this method with the same queue/target/method combination will have\n    no effect (past the initial call).\n  \n    Note that although you can pass optional arguments these will not be\n    considered when looking for duplicates. New arguments will replace previous\n    calls.\n  \n    ```javascript\n    import { run, scheduleOnce } from '@ember/runloop';\n  \n    function sayHi() {\n      console.log('hi');\n    }\n  \n    run(function() {\n      scheduleOnce('afterRender', myContext, sayHi);\n      scheduleOnce('afterRender', myContext, sayHi);\n      // sayHi will only be executed once, in the afterRender queue of the RunLoop\n    });\n    ```\n  \n    Also note that for `run.scheduleOnce` to prevent additional calls, you need to\n    pass the same function instance. The following case works as expected:\n  \n    ```javascript\n    function log() {\n      console.log('Logging only once');\n    }\n  \n    function scheduleIt() {\n      scheduleOnce('actions', myContext, log);\n    }\n  \n    scheduleIt();\n    scheduleIt();\n    ```\n  \n    But this other case will schedule the function multiple times:\n  \n    ```javascript\n    import { scheduleOnce } from '@ember/runloop';\n  \n    function scheduleIt() {\n      scheduleOnce('actions', myContext, function() {\n        console.log('Closure');\n      });\n    }\n  \n    scheduleIt();\n    scheduleIt();\n  \n    // \"Closure\" will print twice, even though we're using `run.scheduleOnce`,\n    // because the function we pass to it won't match the\n    // previously scheduled operation.\n    ```\n  \n    Available queues, and their order, can be found at `run.queues`\n  \n    @method scheduleOnce\n    @static\n    @for @ember/runloop\n    @param {String} [queue] The name of the queue to schedule against. Default queues are 'sync' and 'actions'.\n    @param {Object} [target] The target of the method to invoke.\n    @param {Function|String} method The method to invoke.\n      If you pass a string it will be resolved on the\n      target at the time the method is invoked.\n    @param {Object} [args*] Optional arguments to pass to the timeout.\n    @return {Object} Timer information for use in canceling, see `run.cancel`.\n    @public\n  */\n  run.scheduleOnce = function () /*queue, target, method*/{\n    true && !(run.currentRunLoop || !emberDebug.isTesting()) && emberDebug.assert('You have turned on testing mode, which disabled the run-loop\\'s autorun. ' + 'You will need to wrap any code with asynchronous side-effects in a run', run.currentRunLoop || !emberDebug.isTesting());\n\n    return backburner$1.scheduleOnce.apply(backburner$1, arguments);\n  };\n\n  /**\n    Schedules an item to run from within a separate run loop, after\n    control has been returned to the system. This is equivalent to calling\n    `run.later` with a wait time of 1ms.\n  \n    ```javascript\n    import { next } from '@ember/runloop';\n  \n    next(myContext, function() {\n      // code to be executed in the next run loop,\n      // which will be scheduled after the current one\n    });\n    ```\n  \n    Multiple operations scheduled with `run.next` will coalesce\n    into the same later run loop, along with any other operations\n    scheduled by `run.later` that expire right around the same\n    time that `run.next` operations will fire.\n  \n    Note that there are often alternatives to using `run.next`.\n    For instance, if you'd like to schedule an operation to happen\n    after all DOM element operations have completed within the current\n    run loop, you can make use of the `afterRender` run loop queue (added\n    by the `ember-views` package, along with the preceding `render` queue\n    where all the DOM element operations happen).\n  \n    Example:\n  \n    ```app/components/my-component.js\n    import Component from '@ember/component';\n    import { scheduleOnce } from '@ember/runloop';\n  \n    export Component.extend({\n      didInsertElement() {\n        this._super(...arguments);\n        scheduleOnce('afterRender', this, 'processChildElements');\n      },\n  \n      processChildElements() {\n        // ... do something with component's child component\n        // elements after they've finished rendering, which\n        // can't be done within this component's\n        // `didInsertElement` hook because that gets run\n        // before the child elements have been added to the DOM.\n      }\n    });\n    ```\n  \n    One benefit of the above approach compared to using `run.next` is\n    that you will be able to perform DOM/CSS operations before unprocessed\n    elements are rendered to the screen, which may prevent flickering or\n    other artifacts caused by delaying processing until after rendering.\n  \n    The other major benefit to the above approach is that `run.next`\n    introduces an element of non-determinism, which can make things much\n    harder to test, due to its reliance on `setTimeout`; it's much harder\n    to guarantee the order of scheduled operations when they are scheduled\n    outside of the current run loop, i.e. with `run.next`.\n  \n    @method next\n    @static\n    @for @ember/runloop\n    @param {Object} [target] target of method to invoke\n    @param {Function|String} method The method to invoke.\n      If you pass a string it will be resolved on the\n      target at the time the method is invoked.\n    @param {Object} [args*] Optional arguments to pass to the timeout.\n    @return {Object} Timer information for use in canceling, see `run.cancel`.\n    @public\n  */\n  run.next = function () {\n    for (var _len4 = arguments.length, args = Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    args.push(1);\n    return backburner$1.later.apply(backburner$1, args);\n  };\n\n  /**\n    Cancels a scheduled item. Must be a value returned by `later()`,\n    `once()`, `scheduleOnce()`, `next()`, `debounce()`, or\n    `throttle()`.\n  \n    ```javascript\n    import {\n      next,\n      cancel,\n      later,\n      scheduleOnce,\n      once,\n      throttle,\n      debounce\n    } from '@ember/runloop';\n  \n    let runNext = next(myContext, function() {\n      // will not be executed\n    });\n  \n    cancel(runNext);\n  \n    let runLater = later(myContext, function() {\n      // will not be executed\n    }, 500);\n  \n    cancel(runLater);\n  \n    let runScheduleOnce = scheduleOnce('afterRender', myContext, function() {\n      // will not be executed\n    });\n  \n    cancel(runScheduleOnce);\n  \n    let runOnce = once(myContext, function() {\n      // will not be executed\n    });\n  \n    cancel(runOnce);\n  \n    let throttle = throttle(myContext, function() {\n      // will not be executed\n    }, 1, false);\n  \n    cancel(throttle);\n  \n    let debounce = debounce(myContext, function() {\n      // will not be executed\n    }, 1);\n  \n    cancel(debounce);\n  \n    let debounceImmediate = debounce(myContext, function() {\n      // will be executed since we passed in true (immediate)\n    }, 100, true);\n  \n    // the 100ms delay until this method can be called again will be canceled\n    cancel(debounceImmediate);\n    ```\n  \n    @method cancel\n    @static\n    @for @ember/runloop\n    @param {Object} timer Timer object to cancel\n    @return {Boolean} true if canceled or false/undefined if it wasn't found\n    @public\n  */\n  run.cancel = function (timer) {\n    return backburner$1.cancel(timer);\n  };\n\n  /**\n    Delay calling the target method until the debounce period has elapsed\n    with no additional debounce calls. If `debounce` is called again before\n    the specified time has elapsed, the timer is reset and the entire period\n    must pass again before the target method is called.\n  \n    This method should be used when an event may be called multiple times\n    but the action should only be called once when the event is done firing.\n    A common example is for scroll events where you only want updates to\n    happen once scrolling has ceased.\n  \n    ```javascript\n    import { debounce } from '@ember/runloop';\n  \n    function whoRan() {\n      console.log(this.name + ' ran.');\n    }\n  \n    let myContext = { name: 'debounce' };\n  \n    debounce(myContext, whoRan, 150);\n  \n    // less than 150ms passes\n    debounce(myContext, whoRan, 150);\n  \n    // 150ms passes\n    // whoRan is invoked with context myContext\n    // console logs 'debounce ran.' one time.\n    ```\n  \n    Immediate allows you to run the function immediately, but debounce\n    other calls for this function until the wait time has elapsed. If\n    `debounce` is called again before the specified time has elapsed,\n    the timer is reset and the entire period must pass again before\n    the method can be called again.\n  \n    ```javascript\n    import { debounce } from '@ember/runloop';\n  \n    function whoRan() {\n      console.log(this.name + ' ran.');\n    }\n  \n    let myContext = { name: 'debounce' };\n  \n    debounce(myContext, whoRan, 150, true);\n  \n    // console logs 'debounce ran.' one time immediately.\n    // 100ms passes\n    debounce(myContext, whoRan, 150, true);\n  \n    // 150ms passes and nothing else is logged to the console and\n    // the debouncee is no longer being watched\n    debounce(myContext, whoRan, 150, true);\n  \n    // console logs 'debounce ran.' one time immediately.\n    // 150ms passes and nothing else is logged to the console and\n    // the debouncee is no longer being watched\n    ```\n  \n    @method debounce\n    @static\n    @for @ember/runloop\n    @param {Object} [target] target of method to invoke\n    @param {Function|String} method The method to invoke.\n      May be a function or a string. If you pass a string\n      then it will be looked up on the passed target.\n    @param {Object} [args*] Optional arguments to pass to the timeout.\n    @param {Number} wait Number of milliseconds to wait.\n    @param {Boolean} immediate Trigger the function on the leading instead\n      of the trailing edge of the wait interval. Defaults to false.\n    @return {Array} Timer information for use in canceling, see `run.cancel`.\n    @public\n  */\n  run.debounce = function () {\n    return backburner$1.debounce.apply(backburner$1, arguments);\n  };\n\n  /**\n    Ensure that the target method is never called more frequently than\n    the specified spacing period. The target method is called immediately.\n  \n    ```javascript\n    import { throttle } from '@ember/runloop';\n  \n    function whoRan() {\n      console.log(this.name + ' ran.');\n    }\n  \n    let myContext = { name: 'throttle' };\n  \n    throttle(myContext, whoRan, 150);\n    // whoRan is invoked with context myContext\n    // console logs 'throttle ran.'\n  \n    // 50ms passes\n    throttle(myContext, whoRan, 150);\n  \n    // 50ms passes\n    throttle(myContext, whoRan, 150);\n  \n    // 150ms passes\n    throttle(myContext, whoRan, 150);\n    // whoRan is invoked with context myContext\n    // console logs 'throttle ran.'\n    ```\n  \n    @method throttle\n    @static\n    @for @ember/runloop\n    @param {Object} [target] target of method to invoke\n    @param {Function|String} method The method to invoke.\n      May be a function or a string. If you pass a string\n      then it will be looked up on the passed target.\n    @param {Object} [args*] Optional arguments to pass to the timeout.\n    @param {Number} spacing Number of milliseconds to space out requests.\n    @param {Boolean} immediate Trigger the function on the leading instead\n      of the trailing edge of the wait interval. Defaults to true.\n    @return {Array} Timer information for use in canceling, see `run.cancel`.\n    @public\n  */\n  run.throttle = function () {\n    return backburner$1.throttle.apply(backburner$1, arguments);\n  };\n\n  /**\n    Add a new named queue after the specified queue.\n  \n    The queue to add will only be added once.\n  \n    @method _addQueue\n    @param {String} name the name of the queue to add.\n    @param {String} after the name of the queue to add after.\n    @private\n  */\n  run._addQueue = function (name, after) {\n    if (run.queues.indexOf(name) === -1) {\n      run.queues.splice(run.queues.indexOf(after) + 1, 0, name);\n    }\n  };\n\n  /**\n   @module ember\n  */\n  /**\n    Helper class that allows you to register your library with Ember.\n  \n    Singleton created at `Ember.libraries`.\n  \n    @class Libraries\n    @constructor\n    @private\n  */\n  var Libraries = function () {\n    function Libraries() {\n      emberBabel.classCallCheck(this, Libraries);\n\n      this._registry = [];\n      this._coreLibIndex = 0;\n    }\n\n    Libraries.prototype._getLibraryByName = function _getLibraryByName(name) {\n      var libs = this._registry;\n      var count = libs.length;\n\n      for (var i = 0; i < count; i++) {\n        if (libs[i].name === name) {\n          return libs[i];\n        }\n      }\n    };\n\n    Libraries.prototype.register = function register(name, version, isCoreLibrary) {\n      var index = this._registry.length;\n\n      if (!this._getLibraryByName(name)) {\n        if (isCoreLibrary) {\n          index = this._coreLibIndex++;\n        }\n        this._registry.splice(index, 0, { name: name, version: version });\n      } else {\n        true && emberDebug.warn('Library \"' + name + '\" is already registered with Ember.', false, { id: 'ember-metal.libraries-register' });\n      }\n    };\n\n    Libraries.prototype.registerCoreLibrary = function registerCoreLibrary(name, version) {\n      this.register(name, version, true);\n    };\n\n    Libraries.prototype.deRegister = function deRegister(name) {\n      var lib = this._getLibraryByName(name);\n      var index = void 0;\n\n      if (lib) {\n        index = this._registry.indexOf(lib);\n        this._registry.splice(index, 1);\n      }\n    };\n\n    return Libraries;\n  }();\n\n  if (ember_features.EMBER_LIBRARIES_ISREGISTERED) {\n    Libraries.prototype.isRegistered = function (name) {\n      return !!this._getLibraryByName(name);\n    };\n  }\n\n  var libraries = new Libraries();\n\n  /**\n  @module ember\n  */\n\n  /*\n    JavaScript (before ES6) does not have a Map implementation. Objects,\n    which are often used as dictionaries, may only have Strings as keys.\n  \n    Because Ember has a way to get a unique identifier for every object\n    via `guidFor`, we can implement a performant Map with arbitrary\n    keys. Because it is commonly used in low-level bookkeeping, Map is\n    implemented as a pure JavaScript object for performance.\n  \n    This implementation follows the current iteration of the ES6 proposal for\n    maps (http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets),\n    with one exception:  as we do not have the luxury of in-VM iteration, we implement a\n    forEach method for iteration.\n  \n    Map is mocked out to look like an Ember object, so you can do\n    `EmberMap.create()` for symmetry with other Ember classes.\n  */\n\n  function copyNull(obj) {\n    var output = Object.create(null);\n\n    for (var prop in obj) {\n      // hasOwnPropery is not needed because obj is Object.create(null);\n      output[prop] = obj[prop];\n    }\n\n    return output;\n  }\n\n  function copyMap(original, newObject) {\n    var keys = original._keys.copy();\n    var values = copyNull(original._values);\n\n    newObject._keys = keys;\n    newObject._values = values;\n    newObject.size = original.size;\n\n    return newObject;\n  }\n\n  /**\n    This class is used internally by Ember and Ember Data.\n    Please do not use it at this time. We plan to clean it up\n    and add many tests soon.\n  \n    @class OrderedSet\n    @namespace Ember\n    @constructor\n    @private\n  */\n\n  var OrderedSet = function () {\n    function OrderedSet() {\n      emberBabel.classCallCheck(this, OrderedSet);\n\n      this.clear();\n    }\n\n    /**\n      @method create\n      @static\n      @return {Ember.OrderedSet}\n      @private\n    */\n\n    OrderedSet.create = function create() {\n      var Constructor = this;\n      return new Constructor();\n    };\n\n    /**\n      @method clear\n      @private\n    */\n\n    OrderedSet.prototype.clear = function clear() {\n      this.presenceSet = Object.create(null);\n      this.list = [];\n      this.size = 0;\n    };\n\n    /**\n      @method add\n      @param obj\n      @param guid (optional, and for internal use)\n      @return {Ember.OrderedSet}\n      @private\n    */\n\n    OrderedSet.prototype.add = function add(obj, _guid) {\n      var guid = _guid || emberUtils.guidFor(obj);\n      var presenceSet = this.presenceSet;\n      var list = this.list;\n\n      if (presenceSet[guid] !== true) {\n        presenceSet[guid] = true;\n        this.size = list.push(obj);\n      }\n\n      return this;\n    };\n\n    /**\n      @since 1.8.0\n      @method delete\n      @param obj\n      @param _guid (optional and for internal use only)\n      @return {Boolean}\n      @private\n    */\n\n    OrderedSet.prototype.delete = function _delete(obj, _guid) {\n      var guid = _guid || emberUtils.guidFor(obj);\n      var presenceSet = this.presenceSet;\n      var list = this.list;\n\n      if (presenceSet[guid] === true) {\n        delete presenceSet[guid];\n        var index = list.indexOf(obj);\n        if (index > -1) {\n          list.splice(index, 1);\n        }\n        this.size = list.length;\n        return true;\n      } else {\n        return false;\n      }\n    };\n\n    /**\n      @method isEmpty\n      @return {Boolean}\n      @private\n    */\n\n    OrderedSet.prototype.isEmpty = function isEmpty() {\n      return this.size === 0;\n    };\n\n    /**\n      @method has\n      @param obj\n      @return {Boolean}\n      @private\n    */\n\n    OrderedSet.prototype.has = function has(obj) {\n      if (this.size === 0) {\n        return false;\n      }\n\n      var guid = emberUtils.guidFor(obj);\n      var presenceSet = this.presenceSet;\n\n      return presenceSet[guid] === true;\n    };\n\n    /**\n      @method forEach\n      @param {Function} fn\n      @param self\n      @private\n    */\n\n    OrderedSet.prototype.forEach = function forEach(fn /*, ...thisArg*/) {\n      true && !(typeof fn === 'function') && emberDebug.assert(Object.prototype.toString.call(fn) + ' is not a function', typeof fn === 'function');\n\n      if (this.size === 0) {\n        return;\n      }\n\n      var list = this.list;\n\n      if (arguments.length === 2) {\n        for (var i = 0; i < list.length; i++) {\n          fn.call(arguments[1], list[i]);\n        }\n      } else {\n        for (var _i = 0; _i < list.length; _i++) {\n          fn(list[_i]);\n        }\n      }\n    };\n\n    /**\n      @method toArray\n      @return {Array}\n      @private\n    */\n\n    OrderedSet.prototype.toArray = function toArray() {\n      return this.list.slice();\n    };\n\n    /**\n      @method copy\n      @return {Ember.OrderedSet}\n      @private\n    */\n\n    OrderedSet.prototype.copy = function copy() {\n      var Constructor = this.constructor;\n      var set = new Constructor();\n\n      set.presenceSet = copyNull(this.presenceSet);\n      set.list = this.toArray();\n      set.size = this.size;\n\n      return set;\n    };\n\n    return OrderedSet;\n  }();\n\n  /**\n    A Map stores values indexed by keys. Unlike JavaScript's\n    default Objects, the keys of a Map can be any JavaScript\n    object.\n  \n    Internally, a Map has two data structures:\n  \n    1. `keys`: an OrderedSet of all of the existing keys\n    2. `values`: a JavaScript Object indexed by the `guidFor(key)`\n  \n    When a key/value pair is added for the first time, we\n    add the key to the `keys` OrderedSet, and create or\n    replace an entry in `values`. When an entry is deleted,\n    we delete its entry in `keys` and `values`.\n  \n    @class Map\n    @namespace Ember\n    @private\n    @constructor\n  */\n\n  var Map = function () {\n    function Map() {\n      emberBabel.classCallCheck(this, Map);\n\n      this._keys = new OrderedSet();\n      this._values = Object.create(null);\n      this.size = 0;\n    }\n\n    /**\n      @method create\n      @static\n      @private\n    */\n\n    Map.create = function create() {\n      var Constructor = this;\n      return new Constructor();\n    };\n\n    /**\n      Retrieve the value associated with a given key.\n       @method get\n      @param {*} key\n      @return {*} the value associated with the key, or `undefined`\n      @private\n    */\n\n    Map.prototype.get = function get(key) {\n      if (this.size === 0) {\n        return;\n      }\n\n      var values = this._values;\n      var guid = emberUtils.guidFor(key);\n\n      return values[guid];\n    };\n\n    /**\n      Adds a value to the map. If a value for the given key has already been\n      provided, the new value will replace the old value.\n       @method set\n      @param {*} key\n      @param {*} value\n      @return {Ember.Map}\n      @private\n    */\n\n    Map.prototype.set = function set(key, value) {\n      var keys = this._keys;\n      var values = this._values;\n      var guid = emberUtils.guidFor(key);\n\n      // ensure we don't store -0\n      var k = key === -0 ? 0 : key;\n\n      keys.add(k, guid);\n\n      values[guid] = value;\n\n      this.size = keys.size;\n\n      return this;\n    };\n\n    /**\n      Removes a value from the map for an associated key.\n       @since 1.8.0\n      @method delete\n      @param {*} key\n      @return {Boolean} true if an item was removed, false otherwise\n      @private\n    */\n\n    Map.prototype.delete = function _delete(key) {\n      if (this.size === 0) {\n        return false;\n      }\n      // don't use ES6 \"delete\" because it will be annoying\n      // to use in browsers that are not ES6 friendly;\n      var keys = this._keys;\n      var values = this._values;\n      var guid = emberUtils.guidFor(key);\n\n      if (keys.delete(key, guid)) {\n        delete values[guid];\n        this.size = keys.size;\n        return true;\n      } else {\n        return false;\n      }\n    };\n\n    /**\n      Check whether a key is present.\n       @method has\n      @param {*} key\n      @return {Boolean} true if the item was present, false otherwise\n      @private\n    */\n\n    Map.prototype.has = function has(key) {\n      return this._keys.has(key);\n    };\n\n    /**\n      Iterate over all the keys and values. Calls the function once\n      for each key, passing in value, key, and the map being iterated over,\n      in that order.\n       The keys are guaranteed to be iterated over in insertion order.\n       @method forEach\n      @param {Function} callback\n      @param {*} self if passed, the `this` value inside the\n        callback. By default, `this` is the map.\n      @private\n    */\n\n    Map.prototype.forEach = function forEach(callback /*, ...thisArg*/) {\n      true && !(typeof callback === 'function') && emberDebug.assert(Object.prototype.toString.call(callback) + ' is not a function', typeof callback === 'function');\n\n      if (this.size === 0) {\n        return;\n      }\n\n      var map = this;\n      var cb = void 0,\n          thisArg = void 0;\n\n      if (arguments.length === 2) {\n        thisArg = arguments[1];\n        cb = function (key) {\n          return callback.call(thisArg, map.get(key), key, map);\n        };\n      } else {\n        cb = function (key) {\n          return callback(map.get(key), key, map);\n        };\n      }\n\n      this._keys.forEach(cb);\n    };\n\n    /**\n      @method clear\n      @private\n    */\n\n    Map.prototype.clear = function clear() {\n      this._keys.clear();\n      this._values = Object.create(null);\n      this.size = 0;\n    };\n\n    /**\n      @method copy\n      @return {Ember.Map}\n      @private\n    */\n\n    Map.prototype.copy = function copy() {\n      return copyMap(this, new Map());\n    };\n\n    return Map;\n  }();\n\n  /**\n    @class MapWithDefault\n    @namespace Ember\n    @extends Ember.Map\n    @private\n    @constructor\n    @param [options]\n      @param {*} [options.defaultValue]\n  */\n\n  var MapWithDefault = function (_Map) {\n    emberBabel.inherits(MapWithDefault, _Map);\n\n    function MapWithDefault(options) {\n      emberBabel.classCallCheck(this, MapWithDefault);\n\n      var _this = emberBabel.possibleConstructorReturn(this, _Map.call(this));\n\n      _this.defaultValue = options.defaultValue;\n      return _this;\n    }\n\n    /**\n      @method create\n      @static\n      @param [options]\n        @param {*} [options.defaultValue]\n      @return {Ember.MapWithDefault|Ember.Map} If options are passed, returns\n        `MapWithDefault` otherwise returns `EmberMap`\n      @private\n    */\n\n    MapWithDefault.create = function create(options) {\n      if (options) {\n        return new MapWithDefault(options);\n      } else {\n        return new Map();\n      }\n    };\n\n    /**\n      Retrieve the value associated with a given key.\n       @method get\n      @param {*} key\n      @return {*} the value associated with the key, or the default value\n      @private\n    */\n\n    MapWithDefault.prototype.get = function get(key) {\n      var hasValue = this.has(key);\n\n      if (hasValue) {\n        return _Map.prototype.get.call(this, key);\n      } else {\n        var defaultValue = this.defaultValue(key);\n        this.set(key, defaultValue);\n        return defaultValue;\n      }\n    };\n\n    /**\n      @method copy\n      @return {Ember.MapWithDefault}\n      @private\n    */\n\n    MapWithDefault.prototype.copy = function copy() {\n      var Constructor = this.constructor;\n      return copyMap(this, new Constructor({\n        defaultValue: this.defaultValue\n      }));\n    };\n\n    return MapWithDefault;\n  }(Map);\n\n  /**\n   @module @ember/object\n  */\n\n  /**\n    To get multiple properties at once, call `getProperties`\n    with an object followed by a list of strings or an array:\n  \n    ```javascript\n    import { getProperties } from '@ember/object';\n  \n    getProperties(record, 'firstName', 'lastName', 'zipCode');\n    // { firstName: 'John', lastName: 'Doe', zipCode: '10011' }\n    ```\n  \n    is equivalent to:\n  \n    ```javascript\n    import { getProperties } from '@ember/object';\n  \n    getProperties(record, ['firstName', 'lastName', 'zipCode']);\n    // { firstName: 'John', lastName: 'Doe', zipCode: '10011' }\n    ```\n  \n    @method getProperties\n    @static\n    @for @ember/object\n    @param {Object} obj\n    @param {String...|Array} list of keys to get\n    @return {Object}\n    @public\n  */\n  function getProperties(obj) {\n    var ret = {};\n    var propertyNames = arguments;\n    var i = 1;\n\n    if (arguments.length === 2 && Array.isArray(arguments[1])) {\n      i = 0;\n      propertyNames = arguments[1];\n    }\n    for (; i < propertyNames.length; i++) {\n      ret[propertyNames[i]] = get(obj, propertyNames[i]);\n    }\n    return ret;\n  }\n\n  /**\n   @module @ember/object\n  */\n  /**\n    Set a list of properties on an object. These properties are set inside\n    a single `beginPropertyChanges` and `endPropertyChanges` batch, so\n    observers will be buffered.\n  \n    ```javascript\n    let anObject = Ember.Object.create();\n  \n    anObject.setProperties({\n      firstName: 'Stanley',\n      lastName: 'Stuart',\n      age: 21\n    });\n    ```\n  \n    @method setProperties\n    @static\n    @for @ember/object\n    @param obj\n    @param {Object} properties\n    @return properties\n    @public\n  */\n  function setProperties(obj, properties) {\n    if (properties === null || typeof properties !== 'object') {\n      return properties;\n    }\n    changeProperties(function () {\n      var props = Object.keys(properties);\n      var propertyName = void 0;\n\n      for (var i = 0; i < props.length; i++) {\n        propertyName = props[i];\n\n        set(obj, propertyName, properties[propertyName]);\n      }\n    });\n    return properties;\n  }\n\n  /**\n  @module @ember/object\n  */\n\n  var AFTER_OBSERVERS = ':change';\n  var BEFORE_OBSERVERS = ':before';\n\n  function changeEvent(keyName) {\n    return keyName + AFTER_OBSERVERS;\n  }\n\n  function beforeEvent(keyName) {\n    return keyName + BEFORE_OBSERVERS;\n  }\n\n  /**\n    @method addObserver\n    @static\n    @for @ember/object/observers\n    @param obj\n    @param {String} _path\n    @param {Object|Function} target\n    @param {Function|String} [method]\n    @public\n  */\n  function addObserver(obj, _path, target, method) {\n    addListener(obj, changeEvent(_path), target, method);\n    watch(obj, _path);\n\n    return this;\n  }\n\n  function observersFor(obj, path) {\n    return listenersFor(obj, changeEvent(path));\n  }\n\n  /**\n    @method removeObserver\n    @static\n    @for @ember/object/observers\n    @param obj\n    @param {String} path\n    @param {Object|Function} target\n    @param {Function|String} [method]\n    @public\n  */\n  function removeObserver(obj, path, target, method) {\n    unwatch(obj, path);\n    removeListener(obj, changeEvent(path), target, method);\n\n    return this;\n  }\n\n  /**\n    @method _addBeforeObserver\n    @static\n    @for @ember/object/observers\n    @param obj\n    @param {String} path\n    @param {Object|Function} target\n    @param {Function|String} [method]\n    @deprecated\n    @private\n  */\n  function _addBeforeObserver(obj, path, target, method) {\n    addListener(obj, beforeEvent(path), target, method);\n    watch(obj, path);\n\n    return this;\n  }\n\n  // Suspend observer during callback.\n  //\n  // This should only be used by the target of the observer\n  // while it is setting the observed path.\n  function _suspendObserver(obj, path, target, method, callback) {\n    return suspendListener(obj, changeEvent(path), target, method, callback);\n  }\n\n  function _suspendObservers(obj, paths, target, method, callback) {\n    var events = paths.map(changeEvent);\n    return suspendListeners(obj, events, target, method, callback);\n  }\n\n  /**\n    @method removeBeforeObserver\n    @static\n    @for @ember/object/observers\n    @param obj\n    @param {String} path\n    @param {Object|Function} target\n    @param {Function|String} [method]\n    @deprecated\n    @private\n  */\n  function _removeBeforeObserver(obj, path, target, method) {\n    unwatch(obj, path);\n    removeListener(obj, beforeEvent(path), target, method);\n\n    return this;\n  }\n\n  /**\n  @module ember\n  */\n\n  // ..........................................................\n  // BINDING\n  //\n\n  var Binding = function () {\n    function Binding(toPath, fromPath) {\n      emberBabel.classCallCheck(this, Binding);\n\n      // Configuration\n      this._from = fromPath;\n      this._to = toPath;\n      this._oneWay = undefined;\n\n      // State\n      this._direction = undefined;\n      this._readyToSync = undefined;\n      this._fromObj = undefined;\n      this._fromPath = undefined;\n      this._toObj = undefined;\n    }\n\n    /**\n      @class Binding\n      @namespace Ember\n      @deprecated See https://emberjs.com/deprecations/v2.x#toc_ember-binding\n      @public\n    */\n\n    /**\n      This copies the Binding so it can be connected to another object.\n       @method copy\n      @return {Ember.Binding} `this`\n      @public\n    */\n\n    Binding.prototype.copy = function copy() {\n      var copy = new Binding(this._to, this._from);\n      if (this._oneWay) {\n        copy._oneWay = true;\n      }\n      return copy;\n    };\n\n    // ..........................................................\n    // CONFIG\n    //\n\n    /**\n      This will set `from` property path to the specified value. It will not\n      attempt to resolve this property path to an actual object until you\n      connect the binding.\n       The binding will search for the property path starting at the root object\n      you pass when you `connect()` the binding. It follows the same rules as\n      `get()` - see that method for more information.\n       @method from\n      @param {String} path The property path to connect to.\n      @return {Ember.Binding} `this`\n      @public\n    */\n\n    Binding.prototype.from = function from(path) {\n      this._from = path;\n      return this;\n    };\n\n    /**\n      This will set the `to` property path to the specified value. It will not\n      attempt to resolve this property path to an actual object until you\n      connect the binding.\n       The binding will search for the property path starting at the root object\n      you pass when you `connect()` the binding. It follows the same rules as\n      `get()` - see that method for more information.\n       @method to\n      @param {String|Tuple} path A property path or tuple.\n      @return {Ember.Binding} `this`\n      @public\n    */\n\n    Binding.prototype.to = function to(path) {\n      this._to = path;\n      return this;\n    };\n\n    /**\n      Configures the binding as one way. A one-way binding will relay changes\n      on the `from` side to the `to` side, but not the other way around. This\n      means that if you change the `to` side directly, the `from` side may have\n      a different value.\n       @method oneWay\n      @return {Ember.Binding} `this`\n      @public\n    */\n\n    Binding.prototype.oneWay = function oneWay() {\n      this._oneWay = true;\n      return this;\n    };\n\n    /**\n      @method toString\n      @return {String} string representation of binding\n      @public\n    */\n\n    Binding.prototype.toString = function toString$$1() {\n      var oneWay = this._oneWay ? '[oneWay]' : '';\n      return 'Ember.Binding<' + emberUtils.guidFor(this) + '>(' + this._from + ' -> ' + this._to + ')' + oneWay;\n    };\n\n    // ..........................................................\n    // CONNECT AND SYNC\n    //\n\n    /**\n      Attempts to connect this binding instance so that it can receive and relay\n      changes. This method will raise an exception if you have not set the\n      from/to properties yet.\n       @method connect\n      @param {Object} obj The root object for this binding.\n      @return {Ember.Binding} `this`\n      @public\n    */\n\n    Binding.prototype.connect = function connect(obj) {\n      true && !!!obj && emberDebug.assert('Must pass a valid object to Ember.Binding.connect()', !!obj);\n\n      var fromObj = void 0,\n          fromPath = void 0,\n          possibleGlobal = void 0;\n\n      // If the binding's \"from\" path could be interpreted as a global, verify\n      // whether the path refers to a global or not by consulting `Ember.lookup`.\n      if (isGlobalPath(this._from)) {\n        var name = getFirstKey(this._from);\n        possibleGlobal = emberEnvironment.context.lookup[name];\n\n        if (possibleGlobal) {\n          fromObj = possibleGlobal;\n          fromPath = getTailPath(this._from);\n        }\n      }\n\n      if (fromObj === undefined) {\n        fromObj = obj;\n        fromPath = this._from;\n      }\n\n      trySet(obj, this._to, get(fromObj, fromPath));\n\n      // Add an observer on the object to be notified when the binding should be updated.\n      addObserver(fromObj, fromPath, this, 'fromDidChange');\n\n      // If the binding is a two-way binding, also set up an observer on the target.\n      if (!this._oneWay) {\n        addObserver(obj, this._to, this, 'toDidChange');\n      }\n\n      addListener(obj, 'willDestroy', this, 'disconnect');\n\n      fireDeprecations(obj, this._to, this._from, possibleGlobal, this._oneWay, !possibleGlobal && !this._oneWay);\n\n      this._readyToSync = true;\n      this._fromObj = fromObj;\n      this._fromPath = fromPath;\n      this._toObj = obj;\n\n      return this;\n    };\n\n    /**\n      Disconnects the binding instance. Changes will no longer be relayed. You\n      will not usually need to call this method.\n       @method disconnect\n      @return {Ember.Binding} `this`\n      @public\n    */\n\n    Binding.prototype.disconnect = function disconnect() {\n      true && !!!this._toObj && emberDebug.assert('Must pass a valid object to Ember.Binding.disconnect()', !!this._toObj);\n\n      // Remove an observer on the object so we're no longer notified of\n      // changes that should update bindings.\n\n      removeObserver(this._fromObj, this._fromPath, this, 'fromDidChange');\n\n      // If the binding is two-way, remove the observer from the target as well.\n      if (!this._oneWay) {\n        removeObserver(this._toObj, this._to, this, 'toDidChange');\n      }\n\n      this._readyToSync = false; // Disable scheduled syncs...\n      return this;\n    };\n\n    // ..........................................................\n    // PRIVATE\n    //\n\n    /* Called when the from side changes. */\n\n    Binding.prototype.fromDidChange = function fromDidChange(target) {\n      this._scheduleSync('fwd');\n    };\n\n    /* Called when the to side changes. */\n\n    Binding.prototype.toDidChange = function toDidChange(target) {\n      this._scheduleSync('back');\n    };\n\n    Binding.prototype._scheduleSync = function _scheduleSync(dir) {\n      var existingDir = this._direction;\n\n      // If we haven't scheduled the binding yet, schedule it.\n      if (existingDir === undefined) {\n        run.schedule('sync', this, '_sync');\n        this._direction = dir;\n      }\n\n      // If both a 'back' and 'fwd' sync have been scheduled on the same object,\n      // default to a 'fwd' sync so that it remains deterministic.\n      if (existingDir === 'back' && dir === 'fwd') {\n        this._direction = 'fwd';\n      }\n    };\n\n    Binding.prototype._sync = function _sync() {\n      var log = emberEnvironment.ENV.LOG_BINDINGS;\n\n      var toObj = this._toObj;\n\n      // Don't synchronize destroyed objects or disconnected bindings.\n      if (toObj.isDestroyed || !this._readyToSync) {\n        return;\n      }\n\n      // Get the direction of the binding for the object we are\n      // synchronizing from.\n      var direction = this._direction;\n\n      var fromObj = this._fromObj;\n      var fromPath = this._fromPath;\n\n      this._direction = undefined;\n\n      // If we're synchronizing from the remote object...\n      if (direction === 'fwd') {\n        var fromValue = get(fromObj, fromPath);\n        if (log) {\n          Logger.log(' ', this.toString(), '->', fromValue, fromObj);\n        }\n        if (this._oneWay) {\n          trySet(toObj, this._to, fromValue);\n        } else {\n          _suspendObserver(toObj, this._to, this, 'toDidChange', function () {\n            trySet(toObj, this._to, fromValue);\n          });\n        }\n        // If we're synchronizing *to* the remote object.\n      } else if (direction === 'back') {\n        var toValue = get(toObj, this._to);\n        if (log) {\n          Logger.log(' ', this.toString(), '<-', toValue, toObj);\n        }\n        _suspendObserver(fromObj, fromPath, this, 'fromDidChange', function () {\n          trySet(fromObj, fromPath, toValue);\n        });\n      }\n    };\n\n    return Binding;\n  }();\n\n  function fireDeprecations(obj, toPath, fromPath, deprecateGlobal, deprecateOneWay, deprecateAlias) {\n    var deprecateGlobalMessage = '`Ember.Binding` is deprecated. Since you' + ' are binding to a global consider using a service instead.';\n    var deprecateOneWayMessage = '`Ember.Binding` is deprecated. Since you' + ' are using a `oneWay` binding consider using a `readOnly` computed' + ' property instead.';\n    var deprecateAliasMessage = '`Ember.Binding` is deprecated. Consider' + ' using an `alias` computed property instead.';\n\n    var objectInfo = 'The `' + toPath + '` property of `' + obj + '` is an `Ember.Binding` connected to `' + fromPath + '`, but ';\n    true && !!deprecateGlobal && emberDebug.deprecate(objectInfo + deprecateGlobalMessage, !deprecateGlobal, {\n      id: 'ember-metal.binding',\n      until: '3.0.0',\n      url: 'https://emberjs.com/deprecations/v2.x#toc_ember-binding'\n    });\n    true && !!deprecateOneWay && emberDebug.deprecate(objectInfo + deprecateOneWayMessage, !deprecateOneWay, {\n      id: 'ember-metal.binding',\n      until: '3.0.0',\n      url: 'https://emberjs.com/deprecations/v2.x#toc_ember-binding'\n    });\n    true && !!deprecateAlias && emberDebug.deprecate(objectInfo + deprecateAliasMessage, !deprecateAlias, {\n      id: 'ember-metal.binding',\n      until: '3.0.0',\n      url: 'https://emberjs.com/deprecations/v2.x#toc_ember-binding'\n    });\n  }\n\n  function mixinProperties$1(to, from) {\n    for (var key in from) {\n      if (from.hasOwnProperty(key)) {\n        to[key] = from[key];\n      }\n    }\n  }\n\n  mixinProperties$1(Binding, {\n\n    /*\n      See `Ember.Binding.from`.\n       @method from\n      @static\n    */\n    from: function (from) {\n      var C = this;\n      return new C(undefined, from);\n    },\n\n    /*\n      See `Ember.Binding.to`.\n       @method to\n      @static\n    */\n    to: function (to) {\n      var C = this;\n      return new C(to, undefined);\n    }\n  });\n  /**\n    An `Ember.Binding` connects the properties of two objects so that whenever\n    the value of one property changes, the other property will be changed also.\n  \n    ## Automatic Creation of Bindings with `/^*Binding/`-named Properties.\n  \n    You do not usually create Binding objects directly but instead describe\n    bindings in your class or object definition using automatic binding\n    detection.\n  \n    Properties ending in a `Binding` suffix will be converted to `Ember.Binding`\n    instances. The value of this property should be a string representing a path\n    to another object or a custom binding instance created using Binding helpers\n    (see \"One Way Bindings\"):\n  \n    ```\n    valueBinding: \"MyApp.someController.title\"\n    ```\n  \n    This will create a binding from `MyApp.someController.title` to the `value`\n    property of your object instance automatically. Now the two values will be\n    kept in sync.\n  \n    ## One Way Bindings\n  \n    One especially useful binding customization you can use is the `oneWay()`\n    helper. This helper tells Ember that you are only interested in\n    receiving changes on the object you are binding from. For example, if you\n    are binding to a preference and you want to be notified if the preference\n    has changed, but your object will not be changing the preference itself, you\n    could do:\n  \n    ```\n    bigTitlesBinding: Ember.Binding.oneWay(\"MyApp.preferencesController.bigTitles\")\n    ```\n  \n    This way if the value of `MyApp.preferencesController.bigTitles` changes the\n    `bigTitles` property of your object will change also. However, if you\n    change the value of your `bigTitles` property, it will not update the\n    `preferencesController`.\n  \n    One way bindings are almost twice as fast to setup and twice as fast to\n    execute because the binding only has to worry about changes to one side.\n  \n    You should consider using one way bindings anytime you have an object that\n    may be created frequently and you do not intend to change a property; only\n    to monitor it for changes (such as in the example above).\n  \n    ## Adding Bindings Manually\n  \n    All of the examples above show you how to configure a custom binding, but the\n    result of these customizations will be a binding template, not a fully active\n    Binding instance. The binding will actually become active only when you\n    instantiate the object the binding belongs to. It is useful, however, to\n    understand what actually happens when the binding is activated.\n  \n    For a binding to function it must have at least a `from` property and a `to`\n    property. The `from` property path points to the object/key that you want to\n    bind from while the `to` path points to the object/key you want to bind to.\n  \n    When you define a custom binding, you are usually describing the property\n    you want to bind from (such as `MyApp.someController.value` in the examples\n    above). When your object is created, it will automatically assign the value\n    you want to bind `to` based on the name of your binding key. In the\n    examples above, during init, Ember objects will effectively call\n    something like this on your binding:\n  \n    ```javascript\n    binding = Ember.Binding.from(\"valueBinding\").to(\"value\");\n    ```\n  \n    This creates a new binding instance based on the template you provide, and\n    sets the to path to the `value` property of the new object. Now that the\n    binding is fully configured with a `from` and a `to`, it simply needs to be\n    connected to become active. This is done through the `connect()` method:\n  \n    ```javascript\n    binding.connect(this);\n    ```\n  \n    Note that when you connect a binding you pass the object you want it to be\n    connected to. This object will be used as the root for both the from and\n    to side of the binding when inspecting relative paths. This allows the\n    binding to be automatically inherited by subclassed objects as well.\n  \n    This also allows you to bind between objects using the paths you declare in\n    `from` and `to`:\n  \n    ```javascript\n    // Example 1\n    binding = Ember.Binding.from(\"App.someObject.value\").to(\"value\");\n    binding.connect(this);\n  \n    // Example 2\n    binding = Ember.Binding.from(\"parentView.value\").to(\"App.someObject.value\");\n    binding.connect(this);\n    ```\n  \n    Now that the binding is connected, it will observe both the from and to side\n    and relay changes.\n  \n    If you ever needed to do so (you almost never will, but it is useful to\n    understand this anyway), you could manually create an active binding by\n    using the `Ember.bind()` helper method. (This is the same method used by\n    to setup your bindings on objects):\n  \n    ```javascript\n    Ember.bind(MyApp.anotherObject, \"value\", \"MyApp.someController.value\");\n    ```\n  \n    Both of these code fragments have the same effect as doing the most friendly\n    form of binding creation like so:\n  \n    ```javascript\n    MyApp.anotherObject = Ember.Object.create({\n      valueBinding: \"MyApp.someController.value\",\n  \n      // OTHER CODE FOR THIS OBJECT...\n    });\n    ```\n  \n    Ember's built in binding creation method makes it easy to automatically\n    create bindings for you. You should always use the highest-level APIs\n    available, even if you understand how it works underneath.\n  \n    @class Binding\n    @namespace Ember\n    @since Ember 0.9\n    @public\n  */\n  // Ember.Binding = Binding; ES6TODO: where to put this?\n\n\n  /**\n    Global helper method to create a new binding. Just pass the root object\n    along with a `to` and `from` path to create and connect the binding.\n  \n    @method bind\n    @for Ember\n    @param {Object} obj The root object of the transform.\n    @param {String} to The path to the 'to' side of the binding.\n      Must be relative to obj.\n    @param {String} from The path to the 'from' side of the binding.\n      Must be relative to obj or a global path.\n    @return {Ember.Binding} binding instance\n    @public\n  */\n  function bind(obj, to, from) {\n    return new Binding(to, from).connect(obj);\n  }\n\n  /**\n  @module @ember/object\n  */\n  var a_concat = Array.prototype.concat;\n  var isArray = Array.isArray;\n\n  function isMethod(obj) {\n    return 'function' === typeof obj && obj.isMethod !== false && obj !== Boolean && obj !== Object && obj !== Number && obj !== Array && obj !== Date && obj !== String;\n  }\n\n  var CONTINUE = {};\n\n  function mixinProperties(mixinsMeta, mixin) {\n    var guid = void 0;\n\n    if (mixin instanceof Mixin) {\n      guid = emberUtils.guidFor(mixin);\n      if (mixinsMeta.peekMixins(guid)) {\n        return CONTINUE;\n      }\n      mixinsMeta.writeMixins(guid, mixin);\n      return mixin.properties;\n    } else {\n      return mixin; // apply anonymous mixin properties\n    }\n  }\n\n  function concatenatedMixinProperties(concatProp, props, values, base) {\n    // reset before adding each new mixin to pickup concats from previous\n    var concats = values[concatProp] || base[concatProp];\n    if (props[concatProp]) {\n      concats = concats ? a_concat.call(concats, props[concatProp]) : props[concatProp];\n    }\n    return concats;\n  }\n\n  function giveDescriptorSuper(meta$$1, key, property, values, descs, base) {\n    var superProperty = void 0;\n\n    // Computed properties override methods, and do not call super to them\n    if (values[key] === undefined) {\n      // Find the original descriptor in a parent mixin\n      superProperty = descs[key];\n    }\n\n    // If we didn't find the original descriptor in a parent mixin, find\n    // it on the original object.\n    if (!superProperty) {\n      var possibleDesc = base[key];\n      var superDesc = possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor ? possibleDesc : undefined;\n\n      superProperty = superDesc;\n    }\n\n    if (superProperty === undefined || !(superProperty instanceof ComputedProperty)) {\n      return property;\n    }\n\n    // Since multiple mixins may inherit from the same parent, we need\n    // to clone the computed property so that other mixins do not receive\n    // the wrapped version.\n    property = Object.create(property);\n    property._getter = emberUtils.wrap(property._getter, superProperty._getter);\n    if (superProperty._setter) {\n      if (property._setter) {\n        property._setter = emberUtils.wrap(property._setter, superProperty._setter);\n      } else {\n        property._setter = superProperty._setter;\n      }\n    }\n\n    return property;\n  }\n\n  function giveMethodSuper(obj, key, method, values, descs) {\n    var superMethod = void 0;\n\n    // Methods overwrite computed properties, and do not call super to them.\n    if (descs[key] === undefined) {\n      // Find the original method in a parent mixin\n      superMethod = values[key];\n    }\n\n    // If we didn't find the original value in a parent mixin, find it in\n    // the original object\n    superMethod = superMethod || obj[key];\n\n    // Only wrap the new method if the original method was a function\n    if (superMethod === undefined || 'function' !== typeof superMethod) {\n      return method;\n    }\n\n    return emberUtils.wrap(method, superMethod);\n  }\n\n  function applyConcatenatedProperties(obj, key, value, values) {\n    var baseValue = values[key] || obj[key];\n    var ret = void 0;\n\n    if (baseValue === null || baseValue === undefined) {\n      ret = emberUtils.makeArray(value);\n    } else if (isArray(baseValue)) {\n      if (value === null || value === undefined) {\n        ret = baseValue;\n      } else {\n        ret = a_concat.call(baseValue, value);\n      }\n    } else {\n      ret = a_concat.call(emberUtils.makeArray(baseValue), value);\n    }\n\n    {\n      // it is possible to use concatenatedProperties with strings (which cannot be frozen)\n      // only freeze objects...\n      if (typeof ret === 'object' && ret !== null) {\n        // prevent mutating `concatenatedProperties` array after it is applied\n        Object.freeze(ret);\n      }\n    }\n\n    return ret;\n  }\n\n  function applyMergedProperties(obj, key, value, values) {\n    var baseValue = values[key] || obj[key];\n\n    true && !!isArray(value) && emberDebug.assert('You passed in `' + JSON.stringify(value) + '` as the value for `' + key + '` but `' + key + '` cannot be an Array', !isArray(value));\n\n    if (!baseValue) {\n      return value;\n    }\n\n    var newBase = emberUtils.assign({}, baseValue);\n    var hasFunction = false;\n\n    for (var prop in value) {\n      if (!value.hasOwnProperty(prop)) {\n        continue;\n      }\n\n      var propValue = value[prop];\n      if (isMethod(propValue)) {\n        // TODO: support for Computed Properties, etc?\n        hasFunction = true;\n        newBase[prop] = giveMethodSuper(obj, prop, propValue, baseValue, {});\n      } else {\n        newBase[prop] = propValue;\n      }\n    }\n\n    if (hasFunction) {\n      newBase._super = emberUtils.ROOT;\n    }\n\n    return newBase;\n  }\n\n  function addNormalizedProperty(base, key, value, meta$$1, descs, values, concats, mergings) {\n    if (value instanceof Descriptor) {\n      if (value === REQUIRED && descs[key]) {\n        return CONTINUE;\n      }\n\n      // Wrap descriptor function to implement\n      // _super() if needed\n      if (value._getter) {\n        value = giveDescriptorSuper(meta$$1, key, value, values, descs, base);\n      }\n\n      descs[key] = value;\n      values[key] = undefined;\n    } else {\n      if (concats && concats.indexOf(key) >= 0 || key === 'concatenatedProperties' || key === 'mergedProperties') {\n        value = applyConcatenatedProperties(base, key, value, values);\n      } else if (mergings && mergings.indexOf(key) > -1) {\n        value = applyMergedProperties(base, key, value, values);\n      } else if (isMethod(value)) {\n        value = giveMethodSuper(base, key, value, values, descs);\n      }\n\n      descs[key] = undefined;\n      values[key] = value;\n    }\n  }\n\n  function mergeMixins(mixins, meta$$1, descs, values, base, keys) {\n    var currentMixin = void 0,\n        props = void 0,\n        key = void 0,\n        concats = void 0,\n        mergings = void 0;\n\n    function removeKeys(keyName) {\n      delete descs[keyName];\n      delete values[keyName];\n    }\n\n    for (var i = 0; i < mixins.length; i++) {\n      currentMixin = mixins[i];\n      true && !(typeof currentMixin === 'object' && currentMixin !== null && Object.prototype.toString.call(currentMixin) !== '[object Array]') && emberDebug.assert('Expected hash or Mixin instance, got ' + Object.prototype.toString.call(currentMixin), typeof currentMixin === 'object' && currentMixin !== null && Object.prototype.toString.call(currentMixin) !== '[object Array]');\n\n      props = mixinProperties(meta$$1, currentMixin);\n      if (props === CONTINUE) {\n        continue;\n      }\n\n      if (props) {\n        if (base.willMergeMixin) {\n          base.willMergeMixin(props);\n        }\n        concats = concatenatedMixinProperties('concatenatedProperties', props, values, base);\n        mergings = concatenatedMixinProperties('mergedProperties', props, values, base);\n\n        for (key in props) {\n          if (!props.hasOwnProperty(key)) {\n            continue;\n          }\n          keys.push(key);\n          addNormalizedProperty(base, key, props[key], meta$$1, descs, values, concats, mergings);\n        }\n\n        // manually copy toString() because some JS engines do not enumerate it\n        if (props.hasOwnProperty('toString')) {\n          base.toString = props.toString;\n        }\n      } else if (currentMixin.mixins) {\n        mergeMixins(currentMixin.mixins, meta$$1, descs, values, base, keys);\n        if (currentMixin._without) {\n          currentMixin._without.forEach(removeKeys);\n        }\n      }\n    }\n  }\n\n  function detectBinding(key) {\n    var length = key.length;\n\n    return length > 7 && key.charCodeAt(length - 7) === 66 && key.indexOf('inding', length - 6) !== -1;\n  }\n  // warm both paths of above function\n  detectBinding('notbound');\n  detectBinding('fooBinding');\n\n  function connectBindings(obj, meta$$1) {\n    // TODO Mixin.apply(instance) should disconnect binding if exists\n    meta$$1.forEachBindings(function (key, binding) {\n      if (binding) {\n        var to = key.slice(0, -7); // strip Binding off end\n        if (binding instanceof Binding) {\n          binding = binding.copy(); // copy prototypes' instance\n          binding.to(to);\n        } else {\n          // binding is string path\n          binding = new Binding(to, binding);\n        }\n        binding.connect(obj);\n        obj[key] = binding;\n      }\n    });\n    // mark as applied\n    meta$$1.clearBindings();\n  }\n\n  function finishPartial(obj, meta$$1) {\n    connectBindings(obj, meta$$1 === undefined ? meta(obj) : meta$$1);\n    return obj;\n  }\n\n  function followAlias(obj, desc, descs, values) {\n    var altKey = desc.methodName;\n    var value = void 0;\n    var possibleDesc = void 0;\n    if (descs[altKey] || values[altKey]) {\n      value = values[altKey];\n      desc = descs[altKey];\n    } else if ((possibleDesc = obj[altKey]) && possibleDesc !== null && typeof possibleDesc === 'object' && possibleDesc.isDescriptor) {\n      desc = possibleDesc;\n      value = undefined;\n    } else {\n      desc = undefined;\n      value = obj[altKey];\n    }\n\n    return { desc: desc, value: value };\n  }\n\n  function updateObserversAndListeners(obj, key, paths, updateMethod) {\n    if (paths) {\n      for (var i = 0; i < paths.length; i++) {\n        updateMethod(obj, paths[i], null, key);\n      }\n    }\n  }\n\n  function replaceObserversAndListeners(obj, key, observerOrListener) {\n    var prev = obj[key];\n\n    if (typeof prev === 'function') {\n      updateObserversAndListeners(obj, key, prev.__ember_observesBefore__, _removeBeforeObserver);\n      updateObserversAndListeners(obj, key, prev.__ember_observes__, removeObserver);\n      updateObserversAndListeners(obj, key, prev.__ember_listens__, removeListener);\n    }\n\n    if (typeof observerOrListener === 'function') {\n      updateObserversAndListeners(obj, key, observerOrListener.__ember_observesBefore__, _addBeforeObserver);\n      updateObserversAndListeners(obj, key, observerOrListener.__ember_observes__, addObserver);\n      updateObserversAndListeners(obj, key, observerOrListener.__ember_listens__, addListener);\n    }\n  }\n\n  function applyMixin(obj, mixins, partial) {\n    var descs = {};\n    var values = {};\n    var meta$$1 = meta(obj);\n    var keys = [];\n    var key = void 0,\n        value = void 0,\n        desc = void 0;\n\n    obj._super = emberUtils.ROOT;\n\n    // Go through all mixins and hashes passed in, and:\n    //\n    // * Handle concatenated properties\n    // * Handle merged properties\n    // * Set up _super wrapping if necessary\n    // * Set up computed property descriptors\n    // * Copying `toString` in broken browsers\n    mergeMixins(mixins, meta$$1, descs, values, obj, keys);\n\n    for (var i = 0; i < keys.length; i++) {\n      key = keys[i];\n      if (key === 'constructor' || !values.hasOwnProperty(key)) {\n        continue;\n      }\n\n      desc = descs[key];\n      value = values[key];\n\n      if (desc === REQUIRED) {\n        continue;\n      }\n\n      while (desc && desc instanceof Alias) {\n        var followed = followAlias(obj, desc, descs, values);\n        desc = followed.desc;\n        value = followed.value;\n      }\n\n      if (desc === undefined && value === undefined) {\n        continue;\n      }\n\n      replaceObserversAndListeners(obj, key, value);\n\n      if (detectBinding(key)) {\n        meta$$1.writeBindings(key, value);\n      }\n\n      defineProperty(obj, key, desc, value, meta$$1);\n    }\n\n    if (!partial) {\n      // don't apply to prototype\n      finishPartial(obj, meta$$1);\n    }\n\n    return obj;\n  }\n\n  /**\n    @method mixin\n    @param obj\n    @param mixins*\n    @return obj\n    @private\n  */\n  function mixin(obj) {\n    for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n      args[_key - 1] = arguments[_key];\n    }\n\n    applyMixin(obj, args, false);\n    return obj;\n  }\n\n  /**\n    The `Mixin` class allows you to create mixins, whose properties can be\n    added to other classes. For instance,\n  \n    ```javascript\n    import Mixin from '@ember/object/mixin';\n  \n    const EditableMixin = Mixin.create({\n      edit() {\n        console.log('starting to edit');\n        this.set('isEditing', true);\n      },\n      isEditing: false\n    });\n    ```\n  \n    ```javascript\n    import EmberObject from '@ember/object';\n    import EditableMixin from '../mixins/editable';\n  \n    // Mix mixins into classes by passing them as the first arguments to\n    // `.extend.`\n    const Comment = EmberObject.extend(EditableMixin, {\n      post: null\n    });\n  \n    let comment = Comment.create({\n      post: somePost\n    });\n  \n    comment.edit(); // outputs 'starting to edit'\n    ```\n  \n    Note that Mixins are created with `Mixin.create`, not\n    `Mixin.extend`.\n  \n    Note that mixins extend a constructor's prototype so arrays and object literals\n    defined as properties will be shared amongst objects that implement the mixin.\n    If you want to define a property in a mixin that is not shared, you can define\n    it either as a computed property or have it be created on initialization of the object.\n  \n    ```javascript\n    // filters array will be shared amongst any object implementing mixin\n    import Mixin from '@ember/object/mixin';\n    import { A } from '@ember/array';\n  \n    const FilterableMixin = Mixin.create({\n      filters: A()\n    });\n    ```\n  \n    ```javascript\n    import Mixin from '@ember/object/mixin';\n    import { A } from '@ember/array';\n    import { computed } from '@ember/object';\n  \n    // filters will be a separate array for every object implementing the mixin\n    const FilterableMixin = Mixin.create({\n      filters: computed(function() {\n        return A();\n      })\n    });\n    ```\n  \n    ```javascript\n    import Mixin from '@ember/object/mixin';\n    import { A } from '@ember/array';\n  \n    // filters will be created as a separate array during the object's initialization\n    const Filterable = Mixin.create({\n      filters: null,\n  \n      init() {\n        this._super(...arguments);\n        this.set(\"filters\", A());\n      }\n    });\n    ```\n  \n    @class Mixin\n    @public\n  */\n\n  var Mixin = function () {\n    function Mixin(mixins, properties) {\n      emberBabel.classCallCheck(this, Mixin);\n\n      this.properties = properties;\n\n      var length = mixins && mixins.length;\n\n      if (length > 0) {\n        var m = new Array(length);\n\n        for (var i = 0; i < length; i++) {\n          var x = mixins[i];\n          if (x instanceof Mixin) {\n            m[i] = x;\n          } else {\n            m[i] = new Mixin(undefined, x);\n          }\n        }\n\n        this.mixins = m;\n      } else {\n        this.mixins = undefined;\n      }\n      this.ownerConstructor = undefined;\n      this._without = undefined;\n      this[emberUtils.GUID_KEY] = null;\n      this[emberUtils.NAME_KEY] = null;\n      emberDebug.debugSeal(this);\n    }\n\n    Mixin.applyPartial = function applyPartial(obj) {\n      for (var _len2 = arguments.length, args = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {\n        args[_key2 - 1] = arguments[_key2];\n      }\n\n      return applyMixin(obj, args, true);\n    };\n\n    /**\n      @method create\n      @for @ember/object/mixin\n      @static\n      @param arguments*\n      @public\n    */\n\n    Mixin.create = function create() {\n      // ES6TODO: this relies on a global state?\n      unprocessedFlag = true;\n      var M = this;\n\n      for (var _len3 = arguments.length, args = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n        args[_key3] = arguments[_key3];\n      }\n\n      return new M(args, undefined);\n    };\n\n    // returns the mixins currently applied to the specified object\n    // TODO: Make `mixin`\n\n\n    Mixin.mixins = function mixins(obj) {\n      var meta$$1 = exports.peekMeta(obj);\n      var ret = [];\n      if (meta$$1 === undefined) {\n        return ret;\n      }\n\n      meta$$1.forEachMixins(function (key, currentMixin) {\n        // skip primitive mixins since these are always anonymous\n        if (!currentMixin.properties) {\n          ret.push(currentMixin);\n        }\n      });\n\n      return ret;\n    };\n\n    /**\n      @method reopen\n      @param arguments*\n      @private\n    */\n\n    Mixin.prototype.reopen = function reopen() {\n      var currentMixin = void 0;\n\n      if (this.properties) {\n        currentMixin = new Mixin(undefined, this.properties);\n        this.properties = undefined;\n        this.mixins = [currentMixin];\n      } else if (!this.mixins) {\n        this.mixins = [];\n      }\n\n      var mixins = this.mixins;\n      var idx = void 0;\n\n      for (idx = 0; idx < arguments.length; idx++) {\n        currentMixin = arguments[idx];\n        true && !(typeof currentMixin === 'object' && currentMixin !== null && Object.prototype.toString.call(currentMixin) !== '[object Array]') && emberDebug.assert('Expected hash or Mixin instance, got ' + Object.prototype.toString.call(currentMixin), typeof currentMixin === 'object' && currentMixin !== null && Object.prototype.toString.call(currentMixin) !== '[object Array]');\n\n        if (currentMixin instanceof Mixin) {\n          mixins.push(currentMixin);\n        } else {\n          mixins.push(new Mixin(undefined, currentMixin));\n        }\n      }\n\n      return this;\n    };\n\n    /**\n      @method apply\n      @param obj\n      @return applied object\n      @private\n    */\n\n    Mixin.prototype.apply = function apply(obj) {\n      return applyMixin(obj, [this], false);\n    };\n\n    Mixin.prototype.applyPartial = function applyPartial(obj) {\n      return applyMixin(obj, [this], true);\n    };\n\n    /**\n      @method detect\n      @param obj\n      @return {Boolean}\n      @private\n    */\n\n    Mixin.prototype.detect = function detect(obj) {\n      if (typeof obj !== 'object' || obj === null) {\n        return false;\n      }\n      if (obj instanceof Mixin) {\n        return _detect(obj, this, {});\n      }\n      var meta$$1 = exports.peekMeta(obj);\n      if (meta$$1 === undefined) {\n        return false;\n      }\n      return !!meta$$1.peekMixins(emberUtils.guidFor(this));\n    };\n\n    Mixin.prototype.without = function without() {\n      var ret = new Mixin([this]);\n\n      for (var _len4 = arguments.length, args = Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n        args[_key4] = arguments[_key4];\n      }\n\n      ret._without = args;\n      return ret;\n    };\n\n    Mixin.prototype.keys = function keys() {\n      var keys = {};\n      var seen = {};\n\n      _keys(keys, this, seen);\n      var ret = Object.keys(keys);\n      return ret;\n    };\n\n    return Mixin;\n  }();\n\n  Mixin._apply = applyMixin;\n  Mixin.finishPartial = finishPartial;\n\n  var MixinPrototype = Mixin.prototype;\n  MixinPrototype.toString = Object.toString;\n\n  emberDebug.debugSeal(MixinPrototype);\n\n  var unprocessedFlag = false;\n\n  function hasUnprocessedMixins() {\n    return unprocessedFlag;\n  }\n\n  function clearUnprocessedMixins() {\n    unprocessedFlag = false;\n  }\n\n  function _detect(curMixin, targetMixin, seen) {\n    var guid = emberUtils.guidFor(curMixin);\n\n    if (seen[guid]) {\n      return false;\n    }\n    seen[guid] = true;\n\n    if (curMixin === targetMixin) {\n      return true;\n    }\n    var mixins = curMixin.mixins;\n    var loc = mixins ? mixins.length : 0;\n    while (--loc >= 0) {\n      if (_detect(mixins[loc], targetMixin, seen)) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  function _keys(ret, mixin, seen) {\n    if (seen[emberUtils.guidFor(mixin)]) {\n      return;\n    }\n    seen[emberUtils.guidFor(mixin)] = true;\n\n    if (mixin.properties) {\n      var props = Object.keys(mixin.properties);\n      for (var i = 0; i < props.length; i++) {\n        var key = props[i];\n        ret[key] = true;\n      }\n    } else if (mixin.mixins) {\n      mixin.mixins.forEach(function (x) {\n        return _keys(ret, x, seen);\n      });\n    }\n  }\n\n  var REQUIRED = new Descriptor();\n  REQUIRED.toString = function () {\n    return '(Required Property)';\n  };\n\n  /**\n    Denotes a required property for a mixin\n  \n    @method required\n    @for Ember\n    @private\n  */\n  function required() {\n    true && !false && emberDebug.deprecate('Ember.required is deprecated as its behavior is inconsistent and unreliable.', false, { id: 'ember-metal.required', until: '3.0.0' });\n\n    return REQUIRED;\n  }\n\n  function Alias(methodName) {\n    this.isDescriptor = true;\n    this.methodName = methodName;\n  }\n\n  Alias.prototype = new Descriptor();\n\n  /**\n    Makes a method available via an additional name.\n  \n    ```app/utils/person.js\n    import EmberObject, {\n      aliasMethod\n    } from '@ember/object';\n  \n    export default EmberObject.extend({\n      name() {\n        return 'Tomhuda Katzdale';\n      },\n      moniker: aliasMethod('name')\n    });\n    ```\n  \n    ```javascript\n    let goodGuy = Person.create();\n  \n    goodGuy.name();    // 'Tomhuda Katzdale'\n    goodGuy.moniker(); // 'Tomhuda Katzdale'\n    ```\n  \n    @method aliasMethod\n    @static\n    @for @ember/object\n    @param {String} methodName name of the method to alias\n    @public\n  */\n  function aliasMethod(methodName) {\n    return new Alias(methodName);\n  }\n\n  // ..........................................................\n  // OBSERVER HELPER\n  //\n\n  /**\n    Specify a method that observes property changes.\n  \n    ```javascript\n    import EmberObject from '@ember/object';\n    import { observer } from '@ember/object';\n  \n    export default EmberObject.extend({\n      valueObserver: observer('value', function() {\n        // Executes whenever the \"value\" property changes\n      })\n    });\n    ```\n  \n    Also available as `Function.prototype.observes` if prototype extensions are\n    enabled.\n  \n    @method observer\n    @for @ember/object\n    @param {String} propertyNames*\n    @param {Function} func\n    @return func\n    @public\n    @static\n  */\n  function observer() {\n    var _paths = void 0,\n        func = void 0;\n\n    for (var _len5 = arguments.length, args = Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {\n      args[_key5] = arguments[_key5];\n    }\n\n    if (typeof args[args.length - 1] !== 'function') {\n      // revert to old, soft-deprecated argument ordering\n      true && !false && emberDebug.deprecate('Passing the dependentKeys after the callback function in observer is deprecated. Ensure the callback function is the last argument.', false, { id: 'ember-metal.observer-argument-order', until: '3.0.0' });\n\n      func = args.shift();\n      _paths = args;\n    } else {\n      func = args.pop();\n      _paths = args;\n    }\n\n    true && !(typeof func === 'function') && emberDebug.assert('observer called without a function', typeof func === 'function');\n    true && !(_paths.length > 0 && _paths.every(function (p) {\n      return typeof p === 'string' && p.length;\n    })) && emberDebug.assert('observer called without valid path', _paths.length > 0 && _paths.every(function (p) {\n      return typeof p === 'string' && p.length;\n    }));\n\n    var paths = [];\n    var addWatchedProperty = function (path) {\n      return paths.push(path);\n    };\n\n    for (var i = 0; i < _paths.length; ++i) {\n      expandProperties(_paths[i], addWatchedProperty);\n    }\n\n    func.__ember_observes__ = paths;\n    return func;\n  }\n\n  /**\n    Specify a method that observes property changes.\n  \n    ```javascript\n    import EmberObject from '@ember/object';\n  \n    EmberObject.extend({\n      valueObserver: Ember.immediateObserver('value', function() {\n        // Executes whenever the \"value\" property changes\n      })\n    });\n    ```\n  \n    In the future, `observer` may become asynchronous. In this event,\n    `immediateObserver` will maintain the synchronous behavior.\n  \n    Also available as `Function.prototype.observesImmediately` if prototype extensions are\n    enabled.\n  \n    @method _immediateObserver\n    @for Ember\n    @param {String} propertyNames*\n    @param {Function} func\n    @deprecated Use `observer` instead.\n    @return func\n    @private\n  */\n  function _immediateObserver() {\n    true && !false && emberDebug.deprecate('Usage of `Ember.immediateObserver` is deprecated, use `observer` instead.', false, { id: 'ember-metal.immediate-observer', until: '3.0.0' });\n\n    for (var i = 0; i < arguments.length; i++) {\n      var arg = arguments[i];\n      true && !(typeof arg !== 'string' || arg.indexOf('.') === -1) && emberDebug.assert('Immediate observers must observe internal properties only, not properties on other objects.', typeof arg !== 'string' || arg.indexOf('.') === -1);\n    }\n\n    return observer.apply(this, arguments);\n  }\n\n  /**\n    When observers fire, they are called with the arguments `obj`, `keyName`.\n  \n    Note, `@each.property` observer is called per each add or replace of an element\n    and it's not called with a specific enumeration item.\n  \n    A `_beforeObserver` fires before a property changes.\n  \n    @method beforeObserver\n    @for Ember\n    @param {String} propertyNames*\n    @param {Function} func\n    @return func\n    @deprecated\n    @private\n  */\n  function _beforeObserver() {\n    for (var _len6 = arguments.length, args = Array(_len6), _key6 = 0; _key6 < _len6; _key6++) {\n      args[_key6] = arguments[_key6];\n    }\n\n    var func = args[args.length - 1];\n    var paths = void 0;\n\n    var addWatchedProperty = function (path) {\n      paths.push(path);\n    };\n\n    var _paths = args.slice(0, -1);\n\n    if (typeof func !== 'function') {\n      // revert to old, soft-deprecated argument ordering\n\n      func = args[0];\n      _paths = args.slice(1);\n    }\n\n    paths = [];\n\n    for (var i = 0; i < _paths.length; ++i) {\n      expandProperties(_paths[i], addWatchedProperty);\n    }\n\n    if (typeof func !== 'function') {\n      throw new emberDebug.EmberError('_beforeObserver called without a function');\n    }\n\n    func.__ember_observesBefore__ = paths;\n    return func;\n  }\n\n  /**\n   @module ember\n   @private\n   */\n\n  /**\n    Read-only property that returns the result of a container lookup.\n  \n    @class InjectedProperty\n    @namespace Ember\n    @constructor\n    @param {String} type The container type the property will lookup\n    @param {String} name (optional) The name the property will lookup, defaults\n           to the property's name\n    @private\n  */\n  function InjectedProperty(type, name) {\n    this.type = type;\n    this.name = name;\n\n    this._super$Constructor(injectedPropertyGet);\n    AliasedPropertyPrototype.oneWay.call(this);\n  }\n\n  function injectedPropertyGet(keyName) {\n    var desc = this[keyName];\n    var owner = emberUtils.getOwner(this) || this.container; // fallback to `container` for backwards compat\n\n    true && !(desc && desc.isDescriptor && desc.type) && emberDebug.assert('InjectedProperties should be defined with the inject computed property macros.', desc && desc.isDescriptor && desc.type);\n    true && !owner && emberDebug.assert('Attempting to lookup an injected property on an object without a container, ensure that the object was instantiated via a container.', owner);\n\n    return owner.lookup(desc.type + ':' + (desc.name || keyName));\n  }\n\n  InjectedProperty.prototype = Object.create(Descriptor.prototype);\n\n  var InjectedPropertyPrototype = InjectedProperty.prototype;\n  var ComputedPropertyPrototype$1 = ComputedProperty.prototype;\n  var AliasedPropertyPrototype = AliasedProperty.prototype;\n\n  InjectedPropertyPrototype._super$Constructor = ComputedProperty;\n\n  InjectedPropertyPrototype.get = ComputedPropertyPrototype$1.get;\n  InjectedPropertyPrototype.readOnly = ComputedPropertyPrototype$1.readOnly;\n  InjectedPropertyPrototype.teardown = ComputedPropertyPrototype$1.teardown;\n\n  var splice = Array.prototype.splice;\n\n  function replace(array, idx, amt, objects) {\n    var args = [].concat(objects);\n    var ret = [];\n    // https://code.google.com/p/chromium/issues/detail?id=56588\n    var size = 60000;\n    var start = idx;\n    var ends = amt;\n    var count = void 0,\n        chunk = void 0;\n\n    while (args.length) {\n      count = ends > size ? size : ends;\n      if (count <= 0) {\n        count = 0;\n      }\n\n      chunk = args.splice(0, size);\n      chunk = [start, count].concat(chunk);\n\n      start += size;\n      ends -= count;\n\n      ret = ret.concat(splice.apply(array, chunk));\n    }\n    return ret;\n  }\n\n  function isProxy(value) {\n    if (typeof value === 'object' && value !== null) {\n      var meta$$1 = exports.peekMeta(value);\n      return meta$$1 === undefined ? false : meta$$1.isProxy();\n    }\n\n    return false;\n  }\n\n  function descriptor(desc) {\n    return new Descriptor$1(desc);\n  }\n\n  /**\n    A wrapper for a native ES5 descriptor. In an ideal world, we wouldn't need\n    this at all, however, the way we currently flatten/merge our mixins require\n    a special value to denote a descriptor.\n  \n    @class Descriptor\n    @private\n  */\n\n  var Descriptor$1 = function (_EmberDescriptor) {\n    emberBabel.inherits(Descriptor$$1, _EmberDescriptor);\n\n    function Descriptor$$1(desc) {\n      emberBabel.classCallCheck(this, Descriptor$$1);\n\n      var _this = emberBabel.possibleConstructorReturn(this, _EmberDescriptor.call(this));\n\n      _this.desc = desc;\n      return _this;\n    }\n\n    Descriptor$$1.prototype.setup = function setup(obj, key) {\n      Object.defineProperty(obj, key, this.desc);\n    };\n\n    Descriptor$$1.prototype.teardown = function teardown(obj, key) {};\n\n    return Descriptor$$1;\n  }(Descriptor);\n\n  exports['default'] = Ember;\n  exports.computed = computed;\n  exports.cacheFor = cacheFor;\n  exports.ComputedProperty = ComputedProperty;\n  exports.alias = alias;\n  exports.merge = merge;\n  exports.deprecateProperty = deprecateProperty;\n  exports.instrument = instrument;\n  exports._instrumentStart = _instrumentStart;\n  exports.instrumentationReset = reset;\n  exports.instrumentationSubscribe = subscribe;\n  exports.instrumentationUnsubscribe = unsubscribe;\n  exports.getOnerror = getOnerror;\n  exports.setOnerror = setOnerror;\n  exports.setDispatchOverride = setDispatchOverride;\n  exports.getDispatchOverride = getDispatchOverride;\n  exports.META_DESC = META_DESC;\n  exports.meta = meta;\n  exports.deleteMeta = deleteMeta;\n  exports.Cache = Cache;\n  exports._getPath = _getPath;\n  exports.get = get;\n  exports.getWithDefault = getWithDefault;\n  exports.set = set;\n  exports.trySet = trySet;\n  exports.WeakMap = WeakMap$1;\n  exports.WeakMapPolyfill = WeakMapPolyfill;\n  exports.addListener = addListener;\n  exports.hasListeners = hasListeners;\n  exports.listenersFor = listenersFor;\n  exports.on = on;\n  exports.removeListener = removeListener;\n  exports.sendEvent = sendEvent;\n  exports.suspendListener = suspendListener;\n  exports.suspendListeners = suspendListeners;\n  exports.watchedEvents = watchedEvents;\n  exports.isNone = isNone;\n  exports.isEmpty = isEmpty;\n  exports.isBlank = isBlank;\n  exports.isPresent = isPresent;\n  exports.run = run;\n  exports.ObserverSet = ObserverSet;\n  exports.beginPropertyChanges = beginPropertyChanges;\n  exports.changeProperties = changeProperties;\n  exports.endPropertyChanges = endPropertyChanges;\n  exports.overrideChains = overrideChains;\n  exports.propertyDidChange = propertyDidChange;\n  exports.propertyWillChange = propertyWillChange;\n  exports.PROPERTY_DID_CHANGE = PROPERTY_DID_CHANGE;\n  exports.defineProperty = defineProperty;\n  exports.Descriptor = Descriptor;\n  exports._hasCachedComputedProperties = _hasCachedComputedProperties;\n  exports.watchKey = watchKey;\n  exports.unwatchKey = unwatchKey;\n  exports.ChainNode = ChainNode;\n  exports.finishChains = finishChains;\n  exports.removeChainWatcher = removeChainWatcher;\n  exports.watchPath = watchPath;\n  exports.unwatchPath = unwatchPath;\n  exports.isWatching = isWatching;\n  exports.unwatch = unwatch;\n  exports.watch = watch;\n  exports.watcherCount = watcherCount;\n  exports.libraries = libraries;\n  exports.Libraries = Libraries;\n  exports.Map = Map;\n  exports.MapWithDefault = MapWithDefault;\n  exports.OrderedSet = OrderedSet;\n  exports.getProperties = getProperties;\n  exports.setProperties = setProperties;\n  exports.expandProperties = expandProperties;\n  exports._suspendObserver = _suspendObserver;\n  exports._suspendObservers = _suspendObservers;\n  exports.addObserver = addObserver;\n  exports.observersFor = observersFor;\n  exports.removeObserver = removeObserver;\n  exports._addBeforeObserver = _addBeforeObserver;\n  exports._removeBeforeObserver = _removeBeforeObserver;\n  exports.Mixin = Mixin;\n  exports.aliasMethod = aliasMethod;\n  exports._immediateObserver = _immediateObserver;\n  exports._beforeObserver = _beforeObserver;\n  exports.mixin = mixin;\n  exports.observer = observer;\n  exports.required = required;\n  exports.REQUIRED = REQUIRED;\n  exports.hasUnprocessedMixins = hasUnprocessedMixins;\n  exports.clearUnprocessedMixins = clearUnprocessedMixins;\n  exports.detectBinding = detectBinding;\n  exports.Binding = Binding;\n  exports.bind = bind;\n  exports.isGlobalPath = isGlobalPath;\n  exports.InjectedProperty = InjectedProperty;\n  exports.setHasViews = setHasViews;\n  exports.tagForProperty = tagForProperty;\n  exports.tagFor = tagFor;\n  exports.markObjectAsDirty = markObjectAsDirty;\n  exports.replace = replace;\n  exports.isProxy = isProxy;\n  exports.descriptor = descriptor;\n\n  Object.defineProperty(exports, '__esModule', { value: true });\n});","enifed('rsvp', ['exports', 'ember-babel', 'node-module'], function (exports, _emberBabel, _nodeModule) {\n  'use strict';\n\n  exports.filter = exports.async = exports.map = exports.reject = exports.resolve = exports.off = exports.on = exports.configure = exports.denodeify = exports.defer = exports.rethrow = exports.hashSettled = exports.hash = exports.race = exports.allSettled = exports.all = exports.EventTarget = exports.Promise = exports.cast = exports.asap = undefined;\n\n  var _rsvp;\n\n  function callbacksFor(object) {\n    var callbacks = object._promiseCallbacks;\n\n    if (!callbacks) {\n      callbacks = object._promiseCallbacks = {};\n    }\n\n    return callbacks;\n  }\n\n  /**\n    @class RSVP.EventTarget\n  */\n  var EventTarget = {\n    mixin: function (object) {\n      object['on'] = this['on'];\n      object['off'] = this['off'];\n      object['trigger'] = this['trigger'];\n      object._promiseCallbacks = undefined;\n      return object;\n    },\n    on: function (eventName, callback) {\n      if (typeof callback !== 'function') {\n        throw new TypeError('Callback must be a function');\n      }\n\n      var allCallbacks = callbacksFor(this),\n          callbacks = void 0;\n\n      callbacks = allCallbacks[eventName];\n\n      if (!callbacks) {\n        callbacks = allCallbacks[eventName] = [];\n      }\n\n      if (callbacks.indexOf(callback)) {\n        callbacks.push(callback);\n      }\n    },\n    off: function (eventName, callback) {\n      var allCallbacks = callbacksFor(this),\n          callbacks = void 0,\n          index = void 0;\n\n      if (!callback) {\n        allCallbacks[eventName] = [];\n        return;\n      }\n\n      callbacks = allCallbacks[eventName];\n\n      index = callbacks.indexOf(callback);\n\n      if (index !== -1) {\n        callbacks.splice(index, 1);\n      }\n    },\n    trigger: function (eventName, options, label) {\n      var allCallbacks = callbacksFor(this),\n          callbacks = void 0,\n          callback = void 0;\n\n      if (callbacks = allCallbacks[eventName]) {\n        // Don't cache the callbacks.length since it may grow\n        for (var i = 0; i < callbacks.length; i++) {\n          callback = callbacks[i];\n\n          callback(options, label);\n        }\n      }\n    }\n  };\n\n  var config = {\n    instrument: false\n  };\n\n  EventTarget['mixin'](config);\n\n  function configure(name, value) {\n    if (arguments.length === 2) {\n      config[name] = value;\n    } else {\n      return config[name];\n    }\n  }\n\n  var queue = [];\n\n  function scheduleFlush() {\n    setTimeout(function () {\n      for (var i = 0; i < queue.length; i++) {\n        var entry = queue[i];\n\n        var payload = entry.payload;\n\n        payload.guid = payload.key + payload.id;\n        payload.childGuid = payload.key + payload.childId;\n        if (payload.error) {\n          payload.stack = payload.error.stack;\n        }\n\n        config['trigger'](entry.name, entry.payload);\n      }\n      queue.length = 0;\n    }, 50);\n  }\n\n  function instrument(eventName, promise, child) {\n    if (1 === queue.push({\n      name: eventName,\n      payload: {\n        key: promise._guidKey,\n        id: promise._id,\n        eventName: eventName,\n        detail: promise._result,\n        childId: child && child._id,\n        label: promise._label,\n        timeStamp: Date.now(),\n        error: config[\"instrument-with-stack\"] ? new Error(promise._label) : null\n      } })) {\n      scheduleFlush();\n    }\n  }\n\n  /**\n    `RSVP.Promise.resolve` returns a promise that will become resolved with the\n    passed `value`. It is shorthand for the following:\n  \n    ```javascript\n    let promise = new RSVP.Promise(function(resolve, reject){\n      resolve(1);\n    });\n  \n    promise.then(function(value){\n      // value === 1\n    });\n    ```\n  \n    Instead of writing the above, your code now simply becomes the following:\n  \n    ```javascript\n    let promise = RSVP.Promise.resolve(1);\n  \n    promise.then(function(value){\n      // value === 1\n    });\n    ```\n  \n    @method resolve\n    @static\n    @param {*} object value that the returned promise will be resolved with\n    @param {String} label optional string for identifying the returned promise.\n    Useful for tooling.\n    @return {Promise} a promise that will become fulfilled with the given\n    `value`\n  */\n  function resolve$1(object, label) {\n    /*jshint validthis:true */\n    var Constructor = this;\n\n    if (object && typeof object === 'object' && object.constructor === Constructor) {\n      return object;\n    }\n\n    var promise = new Constructor(noop, label);\n    resolve(promise, object);\n    return promise;\n  }\n\n  function withOwnPromise() {\n    return new TypeError('A promises callback cannot return that same promise.');\n  }\n\n  function objectOrFunction(x) {\n    var type = typeof x;\n    return x !== null && (type === 'object' || type === 'function');\n  }\n\n  function noop() {}\n\n  var PENDING = void 0;\n  var FULFILLED = 1;\n  var REJECTED = 2;\n\n  function ErrorObject() {\n    this.error = null;\n  }\n\n  var GET_THEN_ERROR = new ErrorObject();\n\n  function getThen(promise) {\n    try {\n      return promise.then;\n    } catch (error) {\n      GET_THEN_ERROR.error = error;\n      return GET_THEN_ERROR;\n    }\n  }\n\n  var TRY_CATCH_ERROR = new ErrorObject();\n\n  var tryCatchCallback = void 0;\n  function tryCatcher() {\n    try {\n      var target = tryCatchCallback;\n      tryCatchCallback = null;\n      return target.apply(this, arguments);\n    } catch (e) {\n      TRY_CATCH_ERROR.error = e;\n      return TRY_CATCH_ERROR;\n    }\n  }\n\n  function tryCatch(fn) {\n    tryCatchCallback = fn;\n    return tryCatcher;\n  }\n\n  function tryThen(then$$1, value, fulfillmentHandler, rejectionHandler) {\n    try {\n      then$$1.call(value, fulfillmentHandler, rejectionHandler);\n    } catch (e) {\n      return e;\n    }\n  }\n\n  function handleForeignThenable(promise, thenable, then$$1) {\n    config.async(function (promise) {\n      var sealed = false;\n      var error = tryThen(then$$1, thenable, function (value) {\n        if (sealed) {\n          return;\n        }\n        sealed = true;\n        if (thenable !== value) {\n          resolve(promise, value, undefined);\n        } else {\n          fulfill(promise, value);\n        }\n      }, function (reason) {\n        if (sealed) {\n          return;\n        }\n        sealed = true;\n\n        reject(promise, reason);\n      }, 'Settle: ' + (promise._label || ' unknown promise'));\n\n      if (!sealed && error) {\n        sealed = true;\n        reject(promise, error);\n      }\n    }, promise);\n  }\n\n  function handleOwnThenable(promise, thenable) {\n    if (thenable._state === FULFILLED) {\n      fulfill(promise, thenable._result);\n    } else if (thenable._state === REJECTED) {\n      thenable._onError = null;\n      reject(promise, thenable._result);\n    } else {\n      subscribe(thenable, undefined, function (value) {\n        if (thenable === value) {\n          fulfill(promise, value);\n        } else {\n          resolve(promise, value);\n        }\n      }, function (reason) {\n        return reject(promise, reason);\n      });\n    }\n  }\n\n  function handleMaybeThenable(promise, maybeThenable, then$$1) {\n    var isOwnThenable = maybeThenable.constructor === promise.constructor && then$$1 === then && promise.constructor.resolve === resolve$1;\n\n    if (isOwnThenable) {\n      handleOwnThenable(promise, maybeThenable);\n    } else if (then$$1 === GET_THEN_ERROR) {\n      var error = GET_THEN_ERROR.error;\n      GET_THEN_ERROR.error = null;\n      reject(promise, error);\n    } else if (typeof then$$1 === 'function') {\n      handleForeignThenable(promise, maybeThenable, then$$1);\n    } else {\n      fulfill(promise, maybeThenable);\n    }\n  }\n\n  function resolve(promise, value) {\n    if (promise === value) {\n      fulfill(promise, value);\n    } else if (objectOrFunction(value)) {\n      handleMaybeThenable(promise, value, getThen(value));\n    } else {\n      fulfill(promise, value);\n    }\n  }\n\n  function publishRejection(promise) {\n    if (promise._onError) {\n      promise._onError(promise._result);\n    }\n\n    publish(promise);\n  }\n\n  function fulfill(promise, value) {\n    if (promise._state !== PENDING) {\n      return;\n    }\n\n    promise._result = value;\n    promise._state = FULFILLED;\n\n    if (promise._subscribers.length === 0) {\n      if (config.instrument) {\n        instrument('fulfilled', promise);\n      }\n    } else {\n      config.async(publish, promise);\n    }\n  }\n\n  function reject(promise, reason) {\n    if (promise._state !== PENDING) {\n      return;\n    }\n    promise._state = REJECTED;\n    promise._result = reason;\n    config.async(publishRejection, promise);\n  }\n\n  function subscribe(parent, child, onFulfillment, onRejection) {\n    var subscribers = parent._subscribers;\n    var length = subscribers.length;\n\n    parent._onError = null;\n\n    subscribers[length] = child;\n    subscribers[length + FULFILLED] = onFulfillment;\n    subscribers[length + REJECTED] = onRejection;\n\n    if (length === 0 && parent._state) {\n      config.async(publish, parent);\n    }\n  }\n\n  function publish(promise) {\n    var subscribers = promise._subscribers;\n    var settled = promise._state;\n\n    if (config.instrument) {\n      instrument(settled === FULFILLED ? 'fulfilled' : 'rejected', promise);\n    }\n\n    if (subscribers.length === 0) {\n      return;\n    }\n\n    var child = void 0,\n        callback = void 0,\n        result = promise._result;\n\n    for (var i = 0; i < subscribers.length; i += 3) {\n      child = subscribers[i];\n      callback = subscribers[i + settled];\n\n      if (child) {\n        invokeCallback(settled, child, callback, result);\n      } else {\n        callback(result);\n      }\n    }\n\n    promise._subscribers.length = 0;\n  }\n\n  function invokeCallback(state, promise, callback, result) {\n    var hasCallback = typeof callback === 'function';\n    var value = void 0;\n\n    if (hasCallback) {\n      value = tryCatch(callback)(result);\n    } else {\n      value = result;\n    }\n\n    if (promise._state !== PENDING) {\n      // noop\n    } else if (value === promise) {\n      reject(promise, withOwnPromise());\n    } else if (value === TRY_CATCH_ERROR) {\n      var error = value.error;\n      value.error = null; // release\n      reject(promise, error);\n    } else if (hasCallback) {\n      resolve(promise, value);\n    } else if (state === FULFILLED) {\n      fulfill(promise, value);\n    } else if (state === REJECTED) {\n      reject(promise, value);\n    }\n  }\n\n  function initializePromise(promise, resolver) {\n    var resolved = false;\n    try {\n      resolver(function (value) {\n        if (resolved) {\n          return;\n        }\n        resolved = true;\n        resolve(promise, value);\n      }, function (reason) {\n        if (resolved) {\n          return;\n        }\n        resolved = true;\n        reject(promise, reason);\n      });\n    } catch (e) {\n      reject(promise, e);\n    }\n  }\n\n  function then(onFulfillment, onRejection, label) {\n    var parent = this;\n    var state = parent._state;\n\n    if (state === FULFILLED && !onFulfillment || state === REJECTED && !onRejection) {\n      config.instrument && instrument('chained', parent, parent);\n      return parent;\n    }\n\n    parent._onError = null;\n\n    var child = new parent.constructor(noop, label);\n    var result = parent._result;\n\n    config.instrument && instrument('chained', parent, child);\n\n    if (state === PENDING) {\n      subscribe(parent, child, onFulfillment, onRejection);\n    } else {\n      var callback = state === FULFILLED ? onFulfillment : onRejection;\n      config.async(function () {\n        return invokeCallback(state, child, callback, result);\n      });\n    }\n\n    return child;\n  }\n\n  var Enumerator = function () {\n    function Enumerator(Constructor, input, abortOnReject, label) {\n      (0, _emberBabel.classCallCheck)(this, Enumerator);\n\n      this._instanceConstructor = Constructor;\n      this.promise = new Constructor(noop, label);\n      this._abortOnReject = abortOnReject;\n      this.isUsingOwnPromise = Constructor === Promise;\n\n      this._init.apply(this, arguments);\n    }\n\n    Enumerator.prototype._init = function _init(Constructor, input) {\n      var len = input.length || 0;\n      this.length = len;\n      this._remaining = len;\n      this._result = new Array(len);\n\n      this._enumerate(input);\n    };\n\n    Enumerator.prototype._enumerate = function _enumerate(input) {\n      var length = this.length;\n      var promise = this.promise;\n\n      for (var i = 0; promise._state === PENDING && i < length; i++) {\n        this._eachEntry(input[i], i, true);\n      }\n\n      this._checkFullfillment();\n    };\n\n    Enumerator.prototype._checkFullfillment = function _checkFullfillment() {\n      if (this._remaining === 0) {\n        fulfill(this.promise, this._result);\n      }\n    };\n\n    Enumerator.prototype._settleMaybeThenable = function _settleMaybeThenable(entry, i, firstPass) {\n      var c = this._instanceConstructor;\n      var resolve$$1 = c.resolve;\n\n      if (resolve$$1 === resolve$1) {\n        var then$$1 = getThen(entry);\n\n        if (then$$1 === then && entry._state !== PENDING) {\n          entry._onError = null;\n          this._settledAt(entry._state, i, entry._result, firstPass);\n        } else if (typeof then$$1 !== 'function') {\n          this._settledAt(FULFILLED, i, entry, firstPass);\n        } else if (this.isUsingOwnPromise) {\n          var promise = new c(noop);\n          handleMaybeThenable(promise, entry, then$$1);\n          this._willSettleAt(promise, i, firstPass);\n        } else {\n          this._willSettleAt(new c(function (resolve$$1) {\n            return resolve$$1(entry);\n          }), i, firstPass);\n        }\n      } else {\n        this._willSettleAt(resolve$$1(entry), i, firstPass);\n      }\n    };\n\n    Enumerator.prototype._eachEntry = function _eachEntry(entry, i, firstPass) {\n      if (entry !== null && typeof entry === 'object') {\n        this._settleMaybeThenable(entry, i, firstPass);\n      } else {\n        this._setResultAt(FULFILLED, i, entry, firstPass);\n      }\n    };\n\n    Enumerator.prototype._settledAt = function _settledAt(state, i, value, firstPass) {\n      var promise = this.promise;\n\n      if (promise._state === PENDING) {\n        if (this._abortOnReject && state === REJECTED) {\n          reject(promise, value);\n        } else {\n          this._setResultAt(state, i, value, firstPass);\n          this._checkFullfillment();\n        }\n      }\n    };\n\n    Enumerator.prototype._setResultAt = function _setResultAt(state, i, value, firstPass) {\n      this._remaining--;\n      this._result[i] = value;\n    };\n\n    Enumerator.prototype._willSettleAt = function _willSettleAt(promise, i, firstPass) {\n      var _this = this;\n\n      subscribe(promise, undefined, function (value) {\n        return _this._settledAt(FULFILLED, i, value, firstPass);\n      }, function (reason) {\n        return _this._settledAt(REJECTED, i, reason, firstPass);\n      });\n    };\n\n    return Enumerator;\n  }();\n\n  function setSettledResult(state, i, value) {\n    this._remaining--;\n    if (state === FULFILLED) {\n      this._result[i] = {\n        state: 'fulfilled',\n        value: value\n      };\n    } else {\n      this._result[i] = {\n        state: 'rejected',\n        reason: value\n      };\n    }\n  }\n\n  /**\n    `RSVP.Promise.all` accepts an array of promises, and returns a new promise which\n    is fulfilled with an array of fulfillment values for the passed promises, or\n    rejected with the reason of the first passed promise to be rejected. It casts all\n    elements of the passed iterable to promises as it runs this algorithm.\n  \n    Example:\n  \n    ```javascript\n    let promise1 = RSVP.resolve(1);\n    let promise2 = RSVP.resolve(2);\n    let promise3 = RSVP.resolve(3);\n    let promises = [ promise1, promise2, promise3 ];\n  \n    RSVP.Promise.all(promises).then(function(array){\n      // The array here would be [ 1, 2, 3 ];\n    });\n    ```\n  \n    If any of the `promises` given to `RSVP.all` are rejected, the first promise\n    that is rejected will be given as an argument to the returned promises's\n    rejection handler. For example:\n  \n    Example:\n  \n    ```javascript\n    let promise1 = RSVP.resolve(1);\n    let promise2 = RSVP.reject(new Error(\"2\"));\n    let promise3 = RSVP.reject(new Error(\"3\"));\n    let promises = [ promise1, promise2, promise3 ];\n  \n    RSVP.Promise.all(promises).then(function(array){\n      // Code here never runs because there are rejected promises!\n    }, function(error) {\n      // error.message === \"2\"\n    });\n    ```\n  \n    @method all\n    @static\n    @param {Array} entries array of promises\n    @param {String} label optional string for labeling the promise.\n    Useful for tooling.\n    @return {Promise} promise that is fulfilled when all `promises` have been\n    fulfilled, or rejected if any of them become rejected.\n    @static\n  */\n  function all(entries, label) {\n    if (!Array.isArray(entries)) {\n      return this.reject(new TypeError(\"Promise.all must be called with an array\"), label);\n    }\n    return new Enumerator(this, entries, true /* abort on reject */, label).promise;\n  }\n\n  /**\n    `RSVP.Promise.race` returns a new promise which is settled in the same way as the\n    first passed promise to settle.\n  \n    Example:\n  \n    ```javascript\n    let promise1 = new RSVP.Promise(function(resolve, reject){\n      setTimeout(function(){\n        resolve('promise 1');\n      }, 200);\n    });\n  \n    let promise2 = new RSVP.Promise(function(resolve, reject){\n      setTimeout(function(){\n        resolve('promise 2');\n      }, 100);\n    });\n  \n    RSVP.Promise.race([promise1, promise2]).then(function(result){\n      // result === 'promise 2' because it was resolved before promise1\n      // was resolved.\n    });\n    ```\n  \n    `RSVP.Promise.race` is deterministic in that only the state of the first\n    settled promise matters. For example, even if other promises given to the\n    `promises` array argument are resolved, but the first settled promise has\n    become rejected before the other promises became fulfilled, the returned\n    promise will become rejected:\n  \n    ```javascript\n    let promise1 = new RSVP.Promise(function(resolve, reject){\n      setTimeout(function(){\n        resolve('promise 1');\n      }, 200);\n    });\n  \n    let promise2 = new RSVP.Promise(function(resolve, reject){\n      setTimeout(function(){\n        reject(new Error('promise 2'));\n      }, 100);\n    });\n  \n    RSVP.Promise.race([promise1, promise2]).then(function(result){\n      // Code here never runs\n    }, function(reason){\n      // reason.message === 'promise 2' because promise 2 became rejected before\n      // promise 1 became fulfilled\n    });\n    ```\n  \n    An example real-world use case is implementing timeouts:\n  \n    ```javascript\n    RSVP.Promise.race([ajax('foo.json'), timeout(5000)])\n    ```\n  \n    @method race\n    @static\n    @param {Array} entries array of promises to observe\n    @param {String} label optional string for describing the promise returned.\n    Useful for tooling.\n    @return {Promise} a promise which settles in the same way as the first passed\n    promise to settle.\n  */\n  function race(entries, label) {\n    /*jshint validthis:true */\n    var Constructor = this;\n\n    var promise = new Constructor(noop, label);\n\n    if (!Array.isArray(entries)) {\n      reject(promise, new TypeError('Promise.race must be called with an array'));\n      return promise;\n    }\n\n    for (var i = 0; promise._state === PENDING && i < entries.length; i++) {\n      subscribe(Constructor.resolve(entries[i]), undefined, function (value) {\n        return resolve(promise, value);\n      }, function (reason) {\n        return reject(promise, reason);\n      });\n    }\n\n    return promise;\n  }\n\n  /**\n    `RSVP.Promise.reject` returns a promise rejected with the passed `reason`.\n    It is shorthand for the following:\n  \n    ```javascript\n    let promise = new RSVP.Promise(function(resolve, reject){\n      reject(new Error('WHOOPS'));\n    });\n  \n    promise.then(function(value){\n      // Code here doesn't run because the promise is rejected!\n    }, function(reason){\n      // reason.message === 'WHOOPS'\n    });\n    ```\n  \n    Instead of writing the above, your code now simply becomes the following:\n  \n    ```javascript\n    let promise = RSVP.Promise.reject(new Error('WHOOPS'));\n  \n    promise.then(function(value){\n      // Code here doesn't run because the promise is rejected!\n    }, function(reason){\n      // reason.message === 'WHOOPS'\n    });\n    ```\n  \n    @method reject\n    @static\n    @param {*} reason value that the returned promise will be rejected with.\n    @param {String} label optional string for identifying the returned promise.\n    Useful for tooling.\n    @return {Promise} a promise rejected with the given `reason`.\n  */\n  function reject$1(reason, label) {\n    /*jshint validthis:true */\n    var Constructor = this;\n    var promise = new Constructor(noop, label);\n    reject(promise, reason);\n    return promise;\n  }\n\n  var guidKey = 'rsvp_' + Date.now() + '-';\n  var counter = 0;\n\n  function needsResolver() {\n    throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');\n  }\n\n  function needsNew() {\n    throw new TypeError(\"Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.\");\n  }\n\n  /**\n    Promise objects represent the eventual result of an asynchronous operation. The\n    primary way of interacting with a promise is through its `then` method, which\n    registers callbacks to receive either a promise’s eventual value or the reason\n    why the promise cannot be fulfilled.\n  \n    Terminology\n    -----------\n  \n    - `promise` is an object or function with a `then` method whose behavior conforms to this specification.\n    - `thenable` is an object or function that defines a `then` method.\n    - `value` is any legal JavaScript value (including undefined, a thenable, or a promise).\n    - `exception` is a value that is thrown using the throw statement.\n    - `reason` is a value that indicates why a promise was rejected.\n    - `settled` the final resting state of a promise, fulfilled or rejected.\n  \n    A promise can be in one of three states: pending, fulfilled, or rejected.\n  \n    Promises that are fulfilled have a fulfillment value and are in the fulfilled\n    state.  Promises that are rejected have a rejection reason and are in the\n    rejected state.  A fulfillment value is never a thenable.\n  \n    Promises can also be said to *resolve* a value.  If this value is also a\n    promise, then the original promise's settled state will match the value's\n    settled state.  So a promise that *resolves* a promise that rejects will\n    itself reject, and a promise that *resolves* a promise that fulfills will\n    itself fulfill.\n  \n  \n    Basic Usage:\n    ------------\n  \n    ```js\n    let promise = new Promise(function(resolve, reject) {\n      // on success\n      resolve(value);\n  \n      // on failure\n      reject(reason);\n    });\n  \n    promise.then(function(value) {\n      // on fulfillment\n    }, function(reason) {\n      // on rejection\n    });\n    ```\n  \n    Advanced Usage:\n    ---------------\n  \n    Promises shine when abstracting away asynchronous interactions such as\n    `XMLHttpRequest`s.\n  \n    ```js\n    function getJSON(url) {\n      return new Promise(function(resolve, reject){\n        let xhr = new XMLHttpRequest();\n  \n        xhr.open('GET', url);\n        xhr.onreadystatechange = handler;\n        xhr.responseType = 'json';\n        xhr.setRequestHeader('Accept', 'application/json');\n        xhr.send();\n  \n        function handler() {\n          if (this.readyState === this.DONE) {\n            if (this.status === 200) {\n              resolve(this.response);\n            } else {\n              reject(new Error('getJSON: `' + url + '` failed with status: [' + this.status + ']'));\n            }\n          }\n        };\n      });\n    }\n  \n    getJSON('/posts.json').then(function(json) {\n      // on fulfillment\n    }, function(reason) {\n      // on rejection\n    });\n    ```\n  \n    Unlike callbacks, promises are great composable primitives.\n  \n    ```js\n    Promise.all([\n      getJSON('/posts'),\n      getJSON('/comments')\n    ]).then(function(values){\n      values[0] // => postsJSON\n      values[1] // => commentsJSON\n  \n      return values;\n    });\n    ```\n  \n    @class RSVP.Promise\n    @param {function} resolver\n    @param {String} label optional string for labeling the promise.\n    Useful for tooling.\n    @constructor\n  */\n\n  var Promise = function () {\n    function Promise(resolver, label) {\n      (0, _emberBabel.classCallCheck)(this, Promise);\n\n      this._id = counter++;\n      this._label = label;\n      this._state = undefined;\n      this._result = undefined;\n      this._subscribers = [];\n\n      config.instrument && instrument('created', this);\n\n      if (noop !== resolver) {\n        typeof resolver !== 'function' && needsResolver();\n        this instanceof Promise ? initializePromise(this, resolver) : needsNew();\n      }\n    }\n\n    Promise.prototype._onError = function _onError(reason) {\n      var _this2 = this;\n\n      config.after(function () {\n        if (_this2._onError) {\n          config.trigger('error', reason, _this2._label);\n        }\n      });\n    };\n\n    Promise.prototype.catch = function _catch(onRejection, label) {\n      return this.then(undefined, onRejection, label);\n    };\n\n    Promise.prototype.finally = function _finally(callback, label) {\n      var promise = this;\n      var constructor = promise.constructor;\n\n      return promise.then(function (value) {\n        return constructor.resolve(callback()).then(function () {\n          return value;\n        });\n      }, function (reason) {\n        return constructor.resolve(callback()).then(function () {\n          throw reason;\n        });\n      }, label);\n    };\n\n    return Promise;\n  }();\n\n  Promise.cast = resolve$1; // deprecated\n  Promise.all = all;\n  Promise.race = race;\n  Promise.resolve = resolve$1;\n  Promise.reject = reject$1;\n\n  Promise.prototype._guidKey = guidKey;\n\n  /**\n    The primary way of interacting with a promise is through its `then` method,\n    which registers callbacks to receive either a promise's eventual value or the\n    reason why the promise cannot be fulfilled.\n  \n    ```js\n    findUser().then(function(user){\n      // user is available\n    }, function(reason){\n      // user is unavailable, and you are given the reason why\n    });\n    ```\n  \n    Chaining\n    --------\n  \n    The return value of `then` is itself a promise.  This second, 'downstream'\n    promise is resolved with the return value of the first promise's fulfillment\n    or rejection handler, or rejected if the handler throws an exception.\n  \n    ```js\n    findUser().then(function (user) {\n      return user.name;\n    }, function (reason) {\n      return 'default name';\n    }).then(function (userName) {\n      // If `findUser` fulfilled, `userName` will be the user's name, otherwise it\n      // will be `'default name'`\n    });\n  \n    findUser().then(function (user) {\n      throw new Error('Found user, but still unhappy');\n    }, function (reason) {\n      throw new Error('`findUser` rejected and we\\'re unhappy');\n    }).then(function (value) {\n      // never reached\n    }, function (reason) {\n      // if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.\n      // If `findUser` rejected, `reason` will be '`findUser` rejected and we\\'re unhappy'.\n    });\n    ```\n    If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.\n  \n    ```js\n    findUser().then(function (user) {\n      throw new PedagogicalException('Upstream error');\n    }).then(function (value) {\n      // never reached\n    }).then(function (value) {\n      // never reached\n    }, function (reason) {\n      // The `PedgagocialException` is propagated all the way down to here\n    });\n    ```\n  \n    Assimilation\n    ------------\n  \n    Sometimes the value you want to propagate to a downstream promise can only be\n    retrieved asynchronously. This can be achieved by returning a promise in the\n    fulfillment or rejection handler. The downstream promise will then be pending\n    until the returned promise is settled. This is called *assimilation*.\n  \n    ```js\n    findUser().then(function (user) {\n      return findCommentsByAuthor(user);\n    }).then(function (comments) {\n      // The user's comments are now available\n    });\n    ```\n  \n    If the assimliated promise rejects, then the downstream promise will also reject.\n  \n    ```js\n    findUser().then(function (user) {\n      return findCommentsByAuthor(user);\n    }).then(function (comments) {\n      // If `findCommentsByAuthor` fulfills, we'll have the value here\n    }, function (reason) {\n      // If `findCommentsByAuthor` rejects, we'll have the reason here\n    });\n    ```\n  \n    Simple Example\n    --------------\n  \n    Synchronous Example\n  \n    ```javascript\n    let result;\n  \n    try {\n      result = findResult();\n      // success\n    } catch(reason) {\n      // failure\n    }\n    ```\n  \n    Errback Example\n  \n    ```js\n    findResult(function(result, err){\n      if (err) {\n        // failure\n      } else {\n        // success\n      }\n    });\n    ```\n  \n    Promise Example;\n  \n    ```javascript\n    findResult().then(function(result){\n      // success\n    }, function(reason){\n      // failure\n    });\n    ```\n  \n    Advanced Example\n    --------------\n  \n    Synchronous Example\n  \n    ```javascript\n    let author, books;\n  \n    try {\n      author = findAuthor();\n      books  = findBooksByAuthor(author);\n      // success\n    } catch(reason) {\n      // failure\n    }\n    ```\n  \n    Errback Example\n  \n    ```js\n  \n    function foundBooks(books) {\n  \n    }\n  \n    function failure(reason) {\n  \n    }\n  \n    findAuthor(function(author, err){\n      if (err) {\n        failure(err);\n        // failure\n      } else {\n        try {\n          findBoooksByAuthor(author, function(books, err) {\n            if (err) {\n              failure(err);\n            } else {\n              try {\n                foundBooks(books);\n              } catch(reason) {\n                failure(reason);\n              }\n            }\n          });\n        } catch(error) {\n          failure(err);\n        }\n        // success\n      }\n    });\n    ```\n  \n    Promise Example;\n  \n    ```javascript\n    findAuthor().\n      then(findBooksByAuthor).\n      then(function(books){\n        // found books\n    }).catch(function(reason){\n      // something went wrong\n    });\n    ```\n  \n    @method then\n    @param {Function} onFulfillment\n    @param {Function} onRejection\n    @param {String} label optional string for labeling the promise.\n    Useful for tooling.\n    @return {Promise}\n  */\n  Promise.prototype.then = then;\n\n  function Result() {\n    this.value = undefined;\n  }\n\n  var ERROR = new Result();\n  var GET_THEN_ERROR$1 = new Result();\n\n  function getThen$1(obj) {\n    try {\n      return obj.then;\n    } catch (error) {\n      ERROR.value = error;\n      return ERROR;\n    }\n  }\n\n  function tryApply(f, s, a) {\n    try {\n      f.apply(s, a);\n    } catch (error) {\n      ERROR.value = error;\n      return ERROR;\n    }\n  }\n\n  function makeObject(_, argumentNames) {\n    var obj = {};\n    var length = _.length;\n    var args = new Array(length);\n\n    for (var x = 0; x < length; x++) {\n      args[x] = _[x];\n    }\n\n    for (var i = 0; i < argumentNames.length; i++) {\n      var name = argumentNames[i];\n      obj[name] = args[i + 1];\n    }\n\n    return obj;\n  }\n\n  function arrayResult(_) {\n    var length = _.length;\n    var args = new Array(length - 1);\n\n    for (var i = 1; i < length; i++) {\n      args[i - 1] = _[i];\n    }\n\n    return args;\n  }\n\n  function wrapThenable(then, promise) {\n    return {\n      then: function (onFulFillment, onRejection) {\n        return then.call(promise, onFulFillment, onRejection);\n      }\n    };\n  }\n\n  /**\n    `RSVP.denodeify` takes a 'node-style' function and returns a function that\n    will return an `RSVP.Promise`. You can use `denodeify` in Node.js or the\n    browser when you'd prefer to use promises over using callbacks. For example,\n    `denodeify` transforms the following:\n  \n    ```javascript\n    let fs = require('fs');\n  \n    fs.readFile('myfile.txt', function(err, data){\n      if (err) return handleError(err);\n      handleData(data);\n    });\n    ```\n  \n    into:\n  \n    ```javascript\n    let fs = require('fs');\n    let readFile = RSVP.denodeify(fs.readFile);\n  \n    readFile('myfile.txt').then(handleData, handleError);\n    ```\n  \n    If the node function has multiple success parameters, then `denodeify`\n    just returns the first one:\n  \n    ```javascript\n    let request = RSVP.denodeify(require('request'));\n  \n    request('http://example.com').then(function(res) {\n      // ...\n    });\n    ```\n  \n    However, if you need all success parameters, setting `denodeify`'s\n    second parameter to `true` causes it to return all success parameters\n    as an array:\n  \n    ```javascript\n    let request = RSVP.denodeify(require('request'), true);\n  \n    request('http://example.com').then(function(result) {\n      // result[0] -> res\n      // result[1] -> body\n    });\n    ```\n  \n    Or if you pass it an array with names it returns the parameters as a hash:\n  \n    ```javascript\n    let request = RSVP.denodeify(require('request'), ['res', 'body']);\n  \n    request('http://example.com').then(function(result) {\n      // result.res\n      // result.body\n    });\n    ```\n  \n    Sometimes you need to retain the `this`:\n  \n    ```javascript\n    let app = require('express')();\n    let render = RSVP.denodeify(app.render.bind(app));\n    ```\n  \n    The denodified function inherits from the original function. It works in all\n    environments, except IE 10 and below. Consequently all properties of the original\n    function are available to you. However, any properties you change on the\n    denodeified function won't be changed on the original function. Example:\n  \n    ```javascript\n    let request = RSVP.denodeify(require('request')),\n        cookieJar = request.jar(); // <- Inheritance is used here\n  \n    request('http://example.com', {jar: cookieJar}).then(function(res) {\n      // cookieJar.cookies holds now the cookies returned by example.com\n    });\n    ```\n  \n    Using `denodeify` makes it easier to compose asynchronous operations instead\n    of using callbacks. For example, instead of:\n  \n    ```javascript\n    let fs = require('fs');\n  \n    fs.readFile('myfile.txt', function(err, data){\n      if (err) { ... } // Handle error\n      fs.writeFile('myfile2.txt', data, function(err){\n        if (err) { ... } // Handle error\n        console.log('done')\n      });\n    });\n    ```\n  \n    you can chain the operations together using `then` from the returned promise:\n  \n    ```javascript\n    let fs = require('fs');\n    let readFile = RSVP.denodeify(fs.readFile);\n    let writeFile = RSVP.denodeify(fs.writeFile);\n  \n    readFile('myfile.txt').then(function(data){\n      return writeFile('myfile2.txt', data);\n    }).then(function(){\n      console.log('done')\n    }).catch(function(error){\n      // Handle error\n    });\n    ```\n  \n    @method denodeify\n    @static\n    @for RSVP\n    @param {Function} nodeFunc a 'node-style' function that takes a callback as\n    its last argument. The callback expects an error to be passed as its first\n    argument (if an error occurred, otherwise null), and the value from the\n    operation as its second argument ('function(err, value){ }').\n    @param {Boolean|Array} [options] An optional paramter that if set\n    to `true` causes the promise to fulfill with the callback's success arguments\n    as an array. This is useful if the node function has multiple success\n    paramters. If you set this paramter to an array with names, the promise will\n    fulfill with a hash with these names as keys and the success parameters as\n    values.\n    @return {Function} a function that wraps `nodeFunc` to return an\n    `RSVP.Promise`\n    @static\n  */\n  function denodeify(nodeFunc, options) {\n    var fn = function () {\n      var self = this;\n      var l = arguments.length;\n      var args = new Array(l + 1);\n      var promiseInput = false;\n\n      for (var i = 0; i < l; ++i) {\n        var arg = arguments[i];\n\n        if (!promiseInput) {\n          // TODO: clean this up\n          promiseInput = needsPromiseInput(arg);\n          if (promiseInput === GET_THEN_ERROR$1) {\n            var p = new Promise(noop);\n            reject(p, GET_THEN_ERROR$1.value);\n            return p;\n          } else if (promiseInput && promiseInput !== true) {\n            arg = wrapThenable(promiseInput, arg);\n          }\n        }\n        args[i] = arg;\n      }\n\n      var promise = new Promise(noop);\n\n      args[l] = function (err, val) {\n        if (err) reject(promise, err);else if (options === undefined) resolve(promise, val);else if (options === true) resolve(promise, arrayResult(arguments));else if (Array.isArray(options)) resolve(promise, makeObject(arguments, options));else resolve(promise, val);\n      };\n\n      if (promiseInput) {\n        return handlePromiseInput(promise, args, nodeFunc, self);\n      } else {\n        return handleValueInput(promise, args, nodeFunc, self);\n      }\n    };\n\n    (0, _emberBabel.defaults)(fn, nodeFunc);\n\n\n    return fn;\n  }\n\n  function handleValueInput(promise, args, nodeFunc, self) {\n    var result = tryApply(nodeFunc, self, args);\n    if (result === ERROR) {\n      reject(promise, result.value);\n    }\n    return promise;\n  }\n\n  function handlePromiseInput(promise, args, nodeFunc, self) {\n    return Promise.all(args).then(function (args) {\n      var result = tryApply(nodeFunc, self, args);\n      if (result === ERROR) {\n        reject(promise, result.value);\n      }\n      return promise;\n    });\n  }\n\n  function needsPromiseInput(arg) {\n    if (arg && typeof arg === 'object') {\n      if (arg.constructor === Promise) {\n        return true;\n      } else {\n        return getThen$1(arg);\n      }\n    } else {\n      return false;\n    }\n  }\n\n  /**\n    This is a convenient alias for `RSVP.Promise.all`.\n  \n    @method all\n    @static\n    @for RSVP\n    @param {Array} array Array of promises.\n    @param {String} label An optional label. This is useful\n    for tooling.\n  */\n  function all$1(array, label) {\n    return Promise.all(array, label);\n  }\n\n  var AllSettled = function (_Enumerator) {\n    (0, _emberBabel.inherits)(AllSettled, _Enumerator);\n\n    function AllSettled(Constructor, entries, label) {\n      (0, _emberBabel.classCallCheck)(this, AllSettled);\n      return (0, _emberBabel.possibleConstructorReturn)(this, _Enumerator.call(this, Constructor, entries, false /* don't abort on reject */, label));\n    }\n\n    return AllSettled;\n  }(Enumerator);\n\n  AllSettled.prototype._setResultAt = setSettledResult;\n\n  /**\n  `RSVP.allSettled` is similar to `RSVP.all`, but instead of implementing\n  a fail-fast method, it waits until all the promises have returned and\n  shows you all the results. This is useful if you want to handle multiple\n  promises' failure states together as a set.\n   Returns a promise that is fulfilled when all the given promises have been\n  settled. The return promise is fulfilled with an array of the states of\n  the promises passed into the `promises` array argument.\n   Each state object will either indicate fulfillment or rejection, and\n  provide the corresponding value or reason. The states will take one of\n  the following formats:\n   ```javascript\n  { state: 'fulfilled', value: value }\n    or\n  { state: 'rejected', reason: reason }\n  ```\n   Example:\n   ```javascript\n  let promise1 = RSVP.Promise.resolve(1);\n  let promise2 = RSVP.Promise.reject(new Error('2'));\n  let promise3 = RSVP.Promise.reject(new Error('3'));\n  let promises = [ promise1, promise2, promise3 ];\n   RSVP.allSettled(promises).then(function(array){\n    // array == [\n    //   { state: 'fulfilled', value: 1 },\n    //   { state: 'rejected', reason: Error },\n    //   { state: 'rejected', reason: Error }\n    // ]\n    // Note that for the second item, reason.message will be '2', and for the\n    // third item, reason.message will be '3'.\n  }, function(error) {\n    // Not run. (This block would only be called if allSettled had failed,\n    // for instance if passed an incorrect argument type.)\n  });\n  ```\n   @method allSettled\n  @static\n  @for RSVP\n  @param {Array} entries\n  @param {String} label - optional string that describes the promise.\n  Useful for tooling.\n  @return {Promise} promise that is fulfilled with an array of the settled\n  states of the constituent promises.\n  */\n\n  function allSettled(entries, label) {\n    if (!Array.isArray(entries)) {\n      return Promise.reject(new TypeError(\"Promise.allSettled must be called with an array\"), label);\n    }\n\n    return new AllSettled(Promise, entries, label).promise;\n  }\n\n  /**\n    This is a convenient alias for `RSVP.Promise.race`.\n  \n    @method race\n    @static\n    @for RSVP\n    @param {Array} array Array of promises.\n    @param {String} label An optional label. This is useful\n    for tooling.\n   */\n  function race$1(array, label) {\n    return Promise.race(array, label);\n  }\n\n  var hasOwnProperty = Object.prototype.hasOwnProperty;\n\n  var PromiseHash = function (_Enumerator2) {\n    (0, _emberBabel.inherits)(PromiseHash, _Enumerator2);\n\n    function PromiseHash(Constructor, object) {\n      var abortOnReject = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;\n      var label = arguments[3];\n      (0, _emberBabel.classCallCheck)(this, PromiseHash);\n      return (0, _emberBabel.possibleConstructorReturn)(this, _Enumerator2.call(this, Constructor, object, abortOnReject, label));\n    }\n\n    PromiseHash.prototype._init = function _init(Constructor, object) {\n      this._result = {};\n\n      this._enumerate(object);\n      if (this._remaining === 0) {\n        fulfill(this.promise, this._result);\n      }\n    };\n\n    PromiseHash.prototype._enumerate = function _enumerate(input) {\n      var promise = this.promise;\n      var results = [];\n\n      for (var key in input) {\n        if (hasOwnProperty.call(input, key)) {\n          results.push({\n            position: key,\n            entry: input[key]\n          });\n        }\n      }\n\n      var length = results.length;\n      this._remaining = length;\n      var result = void 0;\n\n      for (var i = 0; promise._state === PENDING && i < length; i++) {\n        result = results[i];\n        this._eachEntry(result.entry, result.position);\n      }\n    };\n\n    return PromiseHash;\n  }(Enumerator);\n\n  /**\n    `RSVP.hash` is similar to `RSVP.all`, but takes an object instead of an array\n    for its `promises` argument.\n  \n    Returns a promise that is fulfilled when all the given promises have been\n    fulfilled, or rejected if any of them become rejected. The returned promise\n    is fulfilled with a hash that has the same key names as the `promises` object\n    argument. If any of the values in the object are not promises, they will\n    simply be copied over to the fulfilled object.\n  \n    Example:\n  \n    ```javascript\n    let promises = {\n      myPromise: RSVP.resolve(1),\n      yourPromise: RSVP.resolve(2),\n      theirPromise: RSVP.resolve(3),\n      notAPromise: 4\n    };\n  \n    RSVP.hash(promises).then(function(hash){\n      // hash here is an object that looks like:\n      // {\n      //   myPromise: 1,\n      //   yourPromise: 2,\n      //   theirPromise: 3,\n      //   notAPromise: 4\n      // }\n    });\n    ````\n  \n    If any of the `promises` given to `RSVP.hash` are rejected, the first promise\n    that is rejected will be given as the reason to the rejection handler.\n  \n    Example:\n  \n    ```javascript\n    let promises = {\n      myPromise: RSVP.resolve(1),\n      rejectedPromise: RSVP.reject(new Error('rejectedPromise')),\n      anotherRejectedPromise: RSVP.reject(new Error('anotherRejectedPromise')),\n    };\n  \n    RSVP.hash(promises).then(function(hash){\n      // Code here never runs because there are rejected promises!\n    }, function(reason) {\n      // reason.message === 'rejectedPromise'\n    });\n    ```\n  \n    An important note: `RSVP.hash` is intended for plain JavaScript objects that\n    are just a set of keys and values. `RSVP.hash` will NOT preserve prototype\n    chains.\n  \n    Example:\n  \n    ```javascript\n    function MyConstructor(){\n      this.example = RSVP.resolve('Example');\n    }\n  \n    MyConstructor.prototype = {\n      protoProperty: RSVP.resolve('Proto Property')\n    };\n  \n    let myObject = new MyConstructor();\n  \n    RSVP.hash(myObject).then(function(hash){\n      // protoProperty will not be present, instead you will just have an\n      // object that looks like:\n      // {\n      //   example: 'Example'\n      // }\n      //\n      // hash.hasOwnProperty('protoProperty'); // false\n      // 'undefined' === typeof hash.protoProperty\n    });\n    ```\n  \n    @method hash\n    @static\n    @for RSVP\n    @param {Object} object\n    @param {String} label optional string that describes the promise.\n    Useful for tooling.\n    @return {Promise} promise that is fulfilled when all properties of `promises`\n    have been fulfilled, or rejected if any of them become rejected.\n  */\n  function hash(object, label) {\n    if (object === null || typeof object !== 'object') {\n      return Promise.reject(new TypeError(\"Promise.hash must be called with an object\"), label);\n    }\n\n    return new PromiseHash(Promise, object, label).promise;\n  }\n\n  var HashSettled = function (_PromiseHash) {\n    (0, _emberBabel.inherits)(HashSettled, _PromiseHash);\n\n    function HashSettled(Constructor, object, label) {\n      (0, _emberBabel.classCallCheck)(this, HashSettled);\n      return (0, _emberBabel.possibleConstructorReturn)(this, _PromiseHash.call(this, Constructor, object, false, label));\n    }\n\n    return HashSettled;\n  }(PromiseHash);\n\n  HashSettled.prototype._setResultAt = setSettledResult;\n\n  /**\n    `RSVP.hashSettled` is similar to `RSVP.allSettled`, but takes an object\n    instead of an array for its `promises` argument.\n  \n    Unlike `RSVP.all` or `RSVP.hash`, which implement a fail-fast method,\n    but like `RSVP.allSettled`, `hashSettled` waits until all the\n    constituent promises have returned and then shows you all the results\n    with their states and values/reasons. This is useful if you want to\n    handle multiple promises' failure states together as a set.\n  \n    Returns a promise that is fulfilled when all the given promises have been\n    settled, or rejected if the passed parameters are invalid.\n  \n    The returned promise is fulfilled with a hash that has the same key names as\n    the `promises` object argument. If any of the values in the object are not\n    promises, they will be copied over to the fulfilled object and marked with state\n    'fulfilled'.\n  \n    Example:\n  \n    ```javascript\n    let promises = {\n      myPromise: RSVP.Promise.resolve(1),\n      yourPromise: RSVP.Promise.resolve(2),\n      theirPromise: RSVP.Promise.resolve(3),\n      notAPromise: 4\n    };\n  \n    RSVP.hashSettled(promises).then(function(hash){\n      // hash here is an object that looks like:\n      // {\n      //   myPromise: { state: 'fulfilled', value: 1 },\n      //   yourPromise: { state: 'fulfilled', value: 2 },\n      //   theirPromise: { state: 'fulfilled', value: 3 },\n      //   notAPromise: { state: 'fulfilled', value: 4 }\n      // }\n    });\n    ```\n  \n    If any of the `promises` given to `RSVP.hash` are rejected, the state will\n    be set to 'rejected' and the reason for rejection provided.\n  \n    Example:\n  \n    ```javascript\n    let promises = {\n      myPromise: RSVP.Promise.resolve(1),\n      rejectedPromise: RSVP.Promise.reject(new Error('rejection')),\n      anotherRejectedPromise: RSVP.Promise.reject(new Error('more rejection')),\n    };\n  \n    RSVP.hashSettled(promises).then(function(hash){\n      // hash here is an object that looks like:\n      // {\n      //   myPromise:              { state: 'fulfilled', value: 1 },\n      //   rejectedPromise:        { state: 'rejected', reason: Error },\n      //   anotherRejectedPromise: { state: 'rejected', reason: Error },\n      // }\n      // Note that for rejectedPromise, reason.message == 'rejection',\n      // and for anotherRejectedPromise, reason.message == 'more rejection'.\n    });\n    ```\n  \n    An important note: `RSVP.hashSettled` is intended for plain JavaScript objects that\n    are just a set of keys and values. `RSVP.hashSettled` will NOT preserve prototype\n    chains.\n  \n    Example:\n  \n    ```javascript\n    function MyConstructor(){\n      this.example = RSVP.Promise.resolve('Example');\n    }\n  \n    MyConstructor.prototype = {\n      protoProperty: RSVP.Promise.resolve('Proto Property')\n    };\n  \n    let myObject = new MyConstructor();\n  \n    RSVP.hashSettled(myObject).then(function(hash){\n      // protoProperty will not be present, instead you will just have an\n      // object that looks like:\n      // {\n      //   example: { state: 'fulfilled', value: 'Example' }\n      // }\n      //\n      // hash.hasOwnProperty('protoProperty'); // false\n      // 'undefined' === typeof hash.protoProperty\n    });\n    ```\n  \n    @method hashSettled\n    @for RSVP\n    @param {Object} object\n    @param {String} label optional string that describes the promise.\n    Useful for tooling.\n    @return {Promise} promise that is fulfilled when when all properties of `promises`\n    have been settled.\n    @static\n  */\n\n  function hashSettled(object, label) {\n    if (object === null || typeof object !== 'object') {\n      return Promise.reject(new TypeError(\"RSVP.hashSettled must be called with an object\"), label);\n    }\n\n    return new HashSettled(Promise, object, false, label).promise;\n  }\n\n  /**\n    `RSVP.rethrow` will rethrow an error on the next turn of the JavaScript event\n    loop in order to aid debugging.\n  \n    Promises A+ specifies that any exceptions that occur with a promise must be\n    caught by the promises implementation and bubbled to the last handler. For\n    this reason, it is recommended that you always specify a second rejection\n    handler function to `then`. However, `RSVP.rethrow` will throw the exception\n    outside of the promise, so it bubbles up to your console if in the browser,\n    or domain/cause uncaught exception in Node. `rethrow` will also throw the\n    error again so the error can be handled by the promise per the spec.\n  \n    ```javascript\n    function throws(){\n      throw new Error('Whoops!');\n    }\n  \n    let promise = new RSVP.Promise(function(resolve, reject){\n      throws();\n    });\n  \n    promise.catch(RSVP.rethrow).then(function(){\n      // Code here doesn't run because the promise became rejected due to an\n      // error!\n    }, function (err){\n      // handle the error here\n    });\n    ```\n  \n    The 'Whoops' error will be thrown on the next turn of the event loop\n    and you can watch for it in your console. You can also handle it using a\n    rejection handler given to `.then` or `.catch` on the returned promise.\n  \n    @method rethrow\n    @static\n    @for RSVP\n    @param {Error} reason reason the promise became rejected.\n    @throws Error\n    @static\n  */\n  function rethrow(reason) {\n    setTimeout(function () {\n      throw reason;\n    });\n    throw reason;\n  }\n\n  /**\n    `RSVP.defer` returns an object similar to jQuery's `$.Deferred`.\n    `RSVP.defer` should be used when porting over code reliant on `$.Deferred`'s\n    interface. New code should use the `RSVP.Promise` constructor instead.\n  \n    The object returned from `RSVP.defer` is a plain object with three properties:\n  \n    * promise - an `RSVP.Promise`.\n    * reject - a function that causes the `promise` property on this object to\n      become rejected\n    * resolve - a function that causes the `promise` property on this object to\n      become fulfilled.\n  \n    Example:\n  \n     ```javascript\n     let deferred = RSVP.defer();\n  \n     deferred.resolve(\"Success!\");\n  \n     deferred.promise.then(function(value){\n       // value here is \"Success!\"\n     });\n     ```\n  \n    @method defer\n    @static\n    @for RSVP\n    @param {String} label optional string for labeling the promise.\n    Useful for tooling.\n    @return {Object}\n   */\n\n  function defer(label) {\n    var deferred = { resolve: undefined, reject: undefined };\n\n    deferred.promise = new Promise(function (resolve, reject) {\n      deferred.resolve = resolve;\n      deferred.reject = reject;\n    }, label);\n\n    return deferred;\n  }\n\n  var MapEnumerator = function (_Enumerator3) {\n    (0, _emberBabel.inherits)(MapEnumerator, _Enumerator3);\n\n    function MapEnumerator(Constructor, entries, mapFn, label) {\n      (0, _emberBabel.classCallCheck)(this, MapEnumerator);\n      return (0, _emberBabel.possibleConstructorReturn)(this, _Enumerator3.call(this, Constructor, entries, true, label, mapFn));\n    }\n\n    MapEnumerator.prototype._init = function _init(Constructor, input, bool, label, mapFn) {\n      var len = input.length || 0;\n      this.length = len;\n      this._remaining = len;\n      this._result = new Array(len);\n      this._mapFn = mapFn;\n\n      this._enumerate(input);\n    };\n\n    MapEnumerator.prototype._setResultAt = function _setResultAt(state, i, value, firstPass) {\n      if (firstPass) {\n        var val = tryCatch(this._mapFn)(value, i);\n        if (val === TRY_CATCH_ERROR) {\n          this._settledAt(REJECTED, i, val.error, false);\n        } else {\n          this._eachEntry(val, i, false);\n        }\n      } else {\n        this._remaining--;\n        this._result[i] = value;\n      }\n    };\n\n    return MapEnumerator;\n  }(Enumerator);\n\n  /**\n   `RSVP.map` is similar to JavaScript's native `map` method. `mapFn` is eagerly called\n    meaning that as soon as any promise resolves its value will be passed to `mapFn`.\n    `RSVP.map` returns a promise that will become fulfilled with the result of running\n    `mapFn` on the values the promises become fulfilled with.\n  \n    For example:\n  \n    ```javascript\n  \n    let promise1 = RSVP.resolve(1);\n    let promise2 = RSVP.resolve(2);\n    let promise3 = RSVP.resolve(3);\n    let promises = [ promise1, promise2, promise3 ];\n  \n    let mapFn = function(item){\n      return item + 1;\n    };\n  \n    RSVP.map(promises, mapFn).then(function(result){\n      // result is [ 2, 3, 4 ]\n    });\n    ```\n  \n    If any of the `promises` given to `RSVP.map` are rejected, the first promise\n    that is rejected will be given as an argument to the returned promise's\n    rejection handler. For example:\n  \n    ```javascript\n    let promise1 = RSVP.resolve(1);\n    let promise2 = RSVP.reject(new Error('2'));\n    let promise3 = RSVP.reject(new Error('3'));\n    let promises = [ promise1, promise2, promise3 ];\n  \n    let mapFn = function(item){\n      return item + 1;\n    };\n  \n    RSVP.map(promises, mapFn).then(function(array){\n      // Code here never runs because there are rejected promises!\n    }, function(reason) {\n      // reason.message === '2'\n    });\n    ```\n  \n    `RSVP.map` will also wait if a promise is returned from `mapFn`. For example,\n    say you want to get all comments from a set of blog posts, but you need\n    the blog posts first because they contain a url to those comments.\n  \n    ```javscript\n  \n    let mapFn = function(blogPost){\n      // getComments does some ajax and returns an RSVP.Promise that is fulfilled\n      // with some comments data\n      return getComments(blogPost.comments_url);\n    };\n  \n    // getBlogPosts does some ajax and returns an RSVP.Promise that is fulfilled\n    // with some blog post data\n    RSVP.map(getBlogPosts(), mapFn).then(function(comments){\n      // comments is the result of asking the server for the comments\n      // of all blog posts returned from getBlogPosts()\n    });\n    ```\n  \n    @method map\n    @static\n    @for RSVP\n    @param {Array} promises\n    @param {Function} mapFn function to be called on each fulfilled promise.\n    @param {String} label optional string for labeling the promise.\n    Useful for tooling.\n    @return {Promise} promise that is fulfilled with the result of calling\n    `mapFn` on each fulfilled promise or value when they become fulfilled.\n     The promise will be rejected if any of the given `promises` become rejected.\n    @static\n  */\n  function map(promises, mapFn, label) {\n    if (!Array.isArray(promises)) {\n      return Promise.reject(new TypeError(\"RSVP.map must be called with an array\"), label);\n    }\n\n    if (typeof mapFn !== 'function') {\n      return Promise.reject(new TypeError(\"RSVP.map expects a function as a second argument\"), label);\n    }\n\n    return new MapEnumerator(Promise, promises, mapFn, label).promise;\n  }\n\n  /**\n    This is a convenient alias for `RSVP.Promise.resolve`.\n  \n    @method resolve\n    @static\n    @for RSVP\n    @param {*} value value that the returned promise will be resolved with\n    @param {String} label optional string for identifying the returned promise.\n    Useful for tooling.\n    @return {Promise} a promise that will become fulfilled with the given\n    `value`\n  */\n  function resolve$2(value, label) {\n    return Promise.resolve(value, label);\n  }\n\n  /**\n    This is a convenient alias for `RSVP.Promise.reject`.\n  \n    @method reject\n    @static\n    @for RSVP\n    @param {*} reason value that the returned promise will be rejected with.\n    @param {String} label optional string for identifying the returned promise.\n    Useful for tooling.\n    @return {Promise} a promise rejected with the given `reason`.\n  */\n  function reject$2(reason, label) {\n    return Promise.reject(reason, label);\n  }\n\n  var EMPTY_OBJECT = {};\n\n  var FilterEnumerator = function (_Enumerator4) {\n    (0, _emberBabel.inherits)(FilterEnumerator, _Enumerator4);\n\n    function FilterEnumerator(Constructor, entries, filterFn, label) {\n      (0, _emberBabel.classCallCheck)(this, FilterEnumerator);\n      return (0, _emberBabel.possibleConstructorReturn)(this, _Enumerator4.call(this, Constructor, entries, true, label, filterFn));\n    }\n\n    FilterEnumerator.prototype._init = function _init(Constructor, input, bool, label, filterFn) {\n      var len = input.length || 0;\n      this.length = len;\n      this._remaining = len;\n\n      this._result = new Array(len);\n      this._filterFn = filterFn;\n\n      this._enumerate(input);\n    };\n\n    FilterEnumerator.prototype._checkFullfillment = function _checkFullfillment() {\n      if (this._remaining === 0) {\n        this._result = this._result.filter(function (val) {\n          return val !== EMPTY_OBJECT;\n        });\n        fulfill(this.promise, this._result);\n      }\n    };\n\n    FilterEnumerator.prototype._setResultAt = function _setResultAt(state, i, value, firstPass) {\n      if (firstPass) {\n        this._result[i] = value;\n        var val = tryCatch(this._filterFn)(value, i);\n        if (val === TRY_CATCH_ERROR) {\n          this._settledAt(REJECTED, i, val.error, false);\n        } else {\n          this._eachEntry(val, i, false);\n        }\n      } else {\n        this._remaining--;\n        if (!value) {\n          this._result[i] = EMPTY_OBJECT;\n        }\n      }\n    };\n\n    return FilterEnumerator;\n  }(Enumerator);\n\n  /**\n   `RSVP.filter` is similar to JavaScript's native `filter` method.\n   `filterFn` is eagerly called meaning that as soon as any promise\n    resolves its value will be passed to `filterFn`. `RSVP.filter` returns\n    a promise that will become fulfilled with the result of running\n    `filterFn` on the values the promises become fulfilled with.\n  \n    For example:\n  \n    ```javascript\n  \n    let promise1 = RSVP.resolve(1);\n    let promise2 = RSVP.resolve(2);\n    let promise3 = RSVP.resolve(3);\n  \n    let promises = [promise1, promise2, promise3];\n  \n    let filterFn = function(item){\n      return item > 1;\n    };\n  \n    RSVP.filter(promises, filterFn).then(function(result){\n      // result is [ 2, 3 ]\n    });\n    ```\n  \n    If any of the `promises` given to `RSVP.filter` are rejected, the first promise\n    that is rejected will be given as an argument to the returned promise's\n    rejection handler. For example:\n  \n    ```javascript\n    let promise1 = RSVP.resolve(1);\n    let promise2 = RSVP.reject(new Error('2'));\n    let promise3 = RSVP.reject(new Error('3'));\n    let promises = [ promise1, promise2, promise3 ];\n  \n    let filterFn = function(item){\n      return item > 1;\n    };\n  \n    RSVP.filter(promises, filterFn).then(function(array){\n      // Code here never runs because there are rejected promises!\n    }, function(reason) {\n      // reason.message === '2'\n    });\n    ```\n  \n    `RSVP.filter` will also wait for any promises returned from `filterFn`.\n    For instance, you may want to fetch a list of users then return a subset\n    of those users based on some asynchronous operation:\n  \n    ```javascript\n  \n    let alice = { name: 'alice' };\n    let bob   = { name: 'bob' };\n    let users = [ alice, bob ];\n  \n    let promises = users.map(function(user){\n      return RSVP.resolve(user);\n    });\n  \n    let filterFn = function(user){\n      // Here, Alice has permissions to create a blog post, but Bob does not.\n      return getPrivilegesForUser(user).then(function(privs){\n        return privs.can_create_blog_post === true;\n      });\n    };\n    RSVP.filter(promises, filterFn).then(function(users){\n      // true, because the server told us only Alice can create a blog post.\n      users.length === 1;\n      // false, because Alice is the only user present in `users`\n      users[0] === bob;\n    });\n    ```\n  \n    @method filter\n    @static\n    @for RSVP\n    @param {Array} promises\n    @param {Function} filterFn - function to be called on each resolved value to\n    filter the final results.\n    @param {String} label optional string describing the promise. Useful for\n    tooling.\n    @return {Promise}\n  */\n\n  function filter(promises, filterFn, label) {\n    if (!Array.isArray(promises) && !(promises !== null && typeof promises === 'object' && promises.then !== undefined)) {\n      return Promise.reject(new TypeError(\"RSVP.filter must be called with an array or promise\"), label);\n    }\n\n    if (typeof filterFn !== 'function') {\n      return Promise.reject(new TypeError(\"RSVP.filter expects function as a second argument\"), label);\n    }\n\n    return Promise.resolve(promises, label).then(function (promises) {\n      return new FilterEnumerator(Promise, promises, filterFn, label).promise;\n    });\n  }\n\n  var len = 0;\n  var vertxNext = void 0;\n  function asap(callback, arg) {\n    queue$1[len] = callback;\n    queue$1[len + 1] = arg;\n    len += 2;\n    if (len === 2) {\n      // If len is 1, that means that we need to schedule an async flush.\n      // If additional callbacks are queued before the queue is flushed, they\n      // will be processed by this flush that we are scheduling.\n      scheduleFlush$1();\n    }\n  }\n\n  var browserWindow = typeof window !== 'undefined' ? window : undefined;\n  var browserGlobal = browserWindow || {};\n  var BrowserMutationObserver = browserGlobal.MutationObserver || browserGlobal.WebKitMutationObserver;\n  var isNode = typeof self === 'undefined' && typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';\n\n  // test for web worker but not in IE10\n  var isWorker = typeof Uint8ClampedArray !== 'undefined' && typeof importScripts !== 'undefined' && typeof MessageChannel !== 'undefined';\n\n  // node\n  function useNextTick() {\n    var nextTick = process.nextTick;\n    // node version 0.10.x displays a deprecation warning when nextTick is used recursively\n    // setImmediate should be used instead instead\n    var version = process.versions.node.match(/^(?:(\\d+)\\.)?(?:(\\d+)\\.)?(\\*|\\d+)$/);\n    if (Array.isArray(version) && version[1] === '0' && version[2] === '10') {\n      nextTick = setImmediate;\n    }\n    return function () {\n      return nextTick(flush);\n    };\n  }\n\n  // vertx\n  function useVertxTimer() {\n    if (typeof vertxNext !== 'undefined') {\n      return function () {\n        vertxNext(flush);\n      };\n    }\n    return useSetTimeout();\n  }\n\n  function useMutationObserver() {\n    var iterations = 0;\n    var observer = new BrowserMutationObserver(flush);\n    var node = document.createTextNode('');\n    observer.observe(node, { characterData: true });\n\n    return function () {\n      return node.data = iterations = ++iterations % 2;\n    };\n  }\n\n  // web worker\n  function useMessageChannel() {\n    var channel = new MessageChannel();\n    channel.port1.onmessage = flush;\n    return function () {\n      return channel.port2.postMessage(0);\n    };\n  }\n\n  function useSetTimeout() {\n    return function () {\n      return setTimeout(flush, 1);\n    };\n  }\n\n  var queue$1 = new Array(1000);\n\n  function flush() {\n    for (var i = 0; i < len; i += 2) {\n      var callback = queue$1[i];\n      var arg = queue$1[i + 1];\n\n      callback(arg);\n\n      queue$1[i] = undefined;\n      queue$1[i + 1] = undefined;\n    }\n\n    len = 0;\n  }\n\n  function attemptVertex() {\n    try {\n      var r = _nodeModule.require;\n      var vertx = r('vertx');\n      vertxNext = vertx.runOnLoop || vertx.runOnContext;\n      return useVertxTimer();\n    } catch (e) {\n      return useSetTimeout();\n    }\n  }\n\n  var scheduleFlush$1 = void 0;\n  // Decide what async method to use to triggering processing of queued callbacks:\n  if (isNode) {\n    scheduleFlush$1 = useNextTick();\n  } else if (BrowserMutationObserver) {\n    scheduleFlush$1 = useMutationObserver();\n  } else if (isWorker) {\n    scheduleFlush$1 = useMessageChannel();\n  } else if (browserWindow === undefined && typeof _nodeModule.require === 'function') {\n    scheduleFlush$1 = attemptVertex();\n  } else {\n    scheduleFlush$1 = useSetTimeout();\n  }\n\n  var platform = void 0;\n\n  /* global self */\n  if (typeof self === 'object') {\n    platform = self;\n\n    /* global global */\n  } else if (typeof global === 'object') {\n    platform = global;\n  } else {\n    throw new Error('no global: `self` or `global` found');\n  }\n\n  // defaults\n  config.async = asap;\n  config.after = function (cb) {\n    return setTimeout(cb, 0);\n  };\n  var cast = resolve$2;\n\n  var async = function (callback, arg) {\n    return config.async(callback, arg);\n  };\n\n  function on() {\n    config['on'].apply(config, arguments);\n  }\n\n  function off() {\n    config['off'].apply(config, arguments);\n  }\n\n  // Set up instrumentation through `window.__PROMISE_INTRUMENTATION__`\n  if (typeof window !== 'undefined' && typeof window['__PROMISE_INSTRUMENTATION__'] === 'object') {\n    var callbacks = window['__PROMISE_INSTRUMENTATION__'];\n    configure('instrument', true);\n    for (var eventName in callbacks) {\n      if (callbacks.hasOwnProperty(eventName)) {\n        on(eventName, callbacks[eventName]);\n      }\n    }\n  }\n\n  // the default export here is for backwards compat:\n  //   https://github.com/tildeio/rsvp.js/issues/434\n  var rsvp = (_rsvp = {\n    asap: asap,\n    cast: cast,\n    Promise: Promise,\n    EventTarget: EventTarget,\n    all: all$1,\n    allSettled: allSettled,\n    race: race$1,\n    hash: hash,\n    hashSettled: hashSettled,\n    rethrow: rethrow,\n    defer: defer,\n    denodeify: denodeify,\n    configure: configure,\n    on: on,\n    off: off,\n    resolve: resolve$2,\n    reject: reject$2,\n    map: map\n  }, _rsvp['async'] = async, _rsvp.filter = filter, _rsvp);\n\n  exports.asap = asap;\n  exports.cast = cast;\n  exports.Promise = Promise;\n  exports.EventTarget = EventTarget;\n  exports.all = all$1;\n  exports.allSettled = allSettled;\n  exports.race = race$1;\n  exports.hash = hash;\n  exports.hashSettled = hashSettled;\n  exports.rethrow = rethrow;\n  exports.defer = defer;\n  exports.denodeify = denodeify;\n  exports.configure = configure;\n  exports.on = on;\n  exports.off = off;\n  exports.resolve = resolve$2;\n  exports.reject = reject$2;\n  exports.map = map;\n  exports.async = async;\n  exports.filter = filter;\n  exports.default = rsvp;\n});","(function (m) { if (typeof module === \"object\" && module.exports) { module.exports = m } 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