Represents the acknowledgement of processing that a consumer
sends back upstream on Observer.onNext
A channel is meant for imperative style feeding of events.
Used by Observable.materialize.
The Observable interface in the Rx pattern.
The Observer from the Rx pattern is the trio of callbacks that get subscribed to an Observable for receiving events.
Represents the buffering overflowStrategy chosen for actions that need buffering, instructing the pipeline what to do when the buffer is full.
A Subject
is a sort of bridge or proxy that acts both as an
Observer and as an Observable and that must respect the contract of both.
A Subscriber
value is a named tuple of an observer and a scheduler,
whose usage is in Observable.create.