on<T extends AppEvent> method
Subscribe EventBus
on a specific type of event, and register responder to it.
Implementation
@override
Stream<T> on<T extends AppEvent>() {
if (T == dynamic) {
return _lastEventSubject.stream as Stream<T>;
} else {
return _lastEventSubject.stream.where((event) => event is T).cast<T>();
}
}