// Aliases
	var Scheduler = Rx.Scheduler,
		PriorityQueue = Rx.internals.PriorityQueue,
		ScheduledItem = Rx.internals.ScheduledItem,
		SchedulePeriodicRecursive  = Rx.internals.SchedulePeriodicRecursive,
		disposableEmpty = Rx.Disposable.empty,
		inherits = Rx.internals.inherits,
    defaultSubComparer = Rx.helpers.defaultSubComparer;