Check if time limit is satisfied without waiting for it

[alexb5dh]

Is it possible to check that TimeLimiter instance is available (await will return immediately) without actually awaiting it?

Use case: non-blocking rate limiting. A method is being called in a loop and if execution is attempted outside of allowed time constrains, method should just return immediately without blocking the caller.

TimeLimiter.GetAwaiter().IsCompleted is programmed to always return false, so is not an option.