Async

The Async class describes the return value of an asynchronous effect that is imported into an IO value.

Asynchronous effects can return later, which represents an uninterruptible asynchronous action, now which represents a synchronously computed value, maybeLater, which represents an interruptible asynchronous action or maybeLaterIO which represents an interruptible asynchronous action where the canceler has the form Throwable => IO[Nothing, Unit]