Whether the range is empty.
This is the case if the results from the completed futures not having failed have already been popped and either all future have been finished or the timeout has expired.
Potentially blocks until a new result is available or the timeout has expired.
See Implementation
Whether the range is empty.
This is the case if the results from the completed futures not having failed have already been popped and either all future have been finished or the timeout has expired.
Potentially blocks until a new result is available or the timeout has expired.