Class Completable

Direct Known Subclasses:

public abstract class Completable extends Object
An asynchronous computation that does not emit any data. It just completes or emits an error.

How to subscribe?

This class does not provide a way to subscribe using a CompletableSource.Subscriber as such calls are ambiguous about the intent whether the subscribe is part of the same source (a.k.a an operator) or it is a terminal subscribe. If it is required to subscribe to a source, then a source adapter can be used to convert to a CompletableSource.