text:   /**
     * Dematerializes the explicit notification values of an observable sequence as implicit notifications.
     * @returns {Observable} An observable sequence exhibiting the behavior corresponding to the source sequence's notification values.
     */
    observableProto.dematerialize = function () {
      var source = this;
      return new AnonymousObservable(function (o) {
        return source.subscribe(function (x) { return x.accept(o); }, function(e) { o.onError(e); }, function () { o.onCompleted(); });
      }, this);
    };
  