This module contains tools for managing the raw execution of futures, which is needed when building executors (places where futures can run).
More information about executors can be found online at tokio.rs.
Representation of a spawned future/stream.
A trait which represents a sink of notifications that a future is ready to make progress.
An unsafe trait for implementing custom forms of memory management behind a
Spawns a future or stream, returning it and the new task responsible for running it to completion.