EventEmitter Is An RxJS Observable Stream In Angular 2 Beta 6

Yesterday, as I was looking through the Angular 2 Beta 6 source code, I noticed that the EventEmitter class - which powers component and directive outputs - extends the RxJS Subject class. Subject then, in turn, extends both the RxJS Observer and Observable classes. This means that the EventEmitter class is essentially an RxJS observable stream. Which, of course, means that we should be able to op