public Task GetInvocationEventStream(Empty request, IWritableChannel <InvocationEvent> responseStream, MethodCallContext context)
 {
     return(_invocationEventBroadcaster.Subscribe(responseStream, context));
 }
 public Task GetLifecycleEventStream(Empty request, IWritableChannel <AppLifecycleEvent> responseStream, MethodCallContext context)
 {
     return(_appLifecycleEventBroadcaster.Subscribe(responseStream, context));
 }