getObserver

Creates and returns an ObservableObserver that can be used to subscribe this Subject to an Observable. All signals from all Observables subscribed using the returned ObservableObserver are sent to this Subject.

Every time the returned ObservableObserver is subscribed to an Observable, the Disposable returned by the subscribed Observable is either emitted via the onSubscribe callback (if supplied and the Subject is still active), or disposed (if the Subject is no longer active).