Functional Interface:: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Awaitable

Method Summary

Modifier and Type	Method	Description
`default CompletableFuture<Void>`	`asCompletableFuture()`
`void`	`await()`
`default void`	`awaitSilently()`
`static Awaitable`	`failed(Exception e)`
`default Awaitable`	`join(Awaitable other)`
`static Awaitable`	`ready()`

Interface Awaitable