Create wraps starts a coroutine up.

Resume continues a suspend ID, passing data in and out.

ResumeWithContext resumes a coroutine with context.

ResumeWithTimeout resumes a coroutine with timeout.

Start starts a coroutine.

Yield suspends a running coroutine, passing data in and out.

YieldWithContext suspends a running coroutine with context, passing data in and out.

YieldWithTimeout suspends a running coroutine with timeout, passing data in and out.

CLOSED means coroutine not created or ended.

CREATED means coroutine is created and not started.

RUNNING means coroutine is started and running.

SUSPENDED means coroutine is started and yielded.