Unsafe version of onComplete
that triggers execution synchronously
in case the source is already completed.
On Continue, triggers onComplete on the given Observer.
On Continue, triggers onComplete on the given Observer.
Triggers execution of the given callback, once the source terminates either
with a Done
or with a failure.
On Done, triggers Done on the given Promise.
On Done, triggers Continue on the given Promise.
Internal extensions to Future[Ack] used in the implementation of Observable.