  // Aliases
  var Observable = Rx.Observable,
    observableProto = Observable.prototype,
    ObservableBase = Rx.ObservableBase,
    AbstractObserver = Rx.internals.AbstractObserver,
    FlatMapObservable = Rx.FlatMapObservable,
    observableConcat = Observable.concat,
    observableDefer = Observable.defer,
    observableEmpty = Observable.empty,
    disposableEmpty = Rx.Disposable.empty,
    CompositeDisposable = Rx.CompositeDisposable,
    SerialDisposable = Rx.SerialDisposable,
    SingleAssignmentDisposable = Rx.SingleAssignmentDisposable,
    Enumerable = Rx.internals.Enumerable,
    enumerableOf = Enumerable.of,
    currentThreadScheduler = Rx.Scheduler.currentThread,
    AsyncSubject = Rx.AsyncSubject,
    Observer = Rx.Observer,
    inherits = Rx.internals.inherits,
    addProperties = Rx.internals.addProperties,
    helpers = Rx.helpers,
    noop = helpers.noop,
    isPromise = helpers.isPromise,
    isFunction = helpers.isFunction,
    isIterable = Rx.helpers.isIterable,
    isArrayLike = Rx.helpers.isArrayLike,
    isScheduler = Rx.Scheduler.isScheduler,
    observableFromPromise = Observable.fromPromise;
