text:   /**
     *  Returns an observable sequence that contains a single element, using the specified scheduler to send out observer messages.
     *  There is an alias called 'just', and 'returnValue' for browsers <IE9.
     *
     * @example
     *  var res = Rx.Observable.return(42);
     *  var res = Rx.Observable.return(42, Rx.Scheduler.timeout);
     * @param {Mixed} value Single element in the resulting observable sequence.
     * @param {Scheduler} scheduler Scheduler to send the single element on. If not specified, defaults to Scheduler.immediate.
     * @returns {Observable} An observable sequence containing the single specified element.
     */
    var observableReturn = Observable['return'] = Observable.just = function (value, scheduler) {
      isScheduler(scheduler) || (scheduler = immediateScheduler);
      return new AnonymousObservable(function (observer) {
        return scheduler.schedule(function () {
          observer.onNext(value);
          observer.onCompleted();
        });
      });
    };
  
    /** @deprecated use return or just */
    Observable.returnValue = function () {
      deprecate('returnValue', 'return or just');
      return observableReturn.apply(null, arguments);
    };
  