/// module Rx { export interface ControlledObservable { /** * Creates a sliding windowed observable based upon the window size. * @param {Number} windowSize The number of items in the window * @returns {Observable} A windowed observable based upon the window size. */ windowed(windowSize: number): Observable; } } (function() { var observer: Rx.Observable; var controlledObserver: Rx.ControlledObservable; observer = controlledObserver.windowed(1); })