Lines to restrict depot files to specific changelists.
Restricts depot paths to a particular point in time. Example: //depot/path/...@1000 Revisions submitted to the path after the specified changelist will not be visible. Files matching a ChangeView path may not be submitted. Automatic labels may also used to specify a particular point in time: the label's 'Revision' field must be set to a changelist number or a date. If the label has a view, only files that match the intersection of the ChangeViewpath and the label's view will be restricted to the point in time specified by the 'Revision' field; any other files matching the ChangeView path may sync to #head, but cannot be submitted.