This segment's request status.
Aborts the request if the status is currently SegmentStatus.PENDING, and clears the cached buffer. The status will go back to SegmentStatus.INACTIVE and the segment may be requested again in the future.
Clears this segment and removes its handler.
Begins the segment request now if it has not already been requested. The promise returned will settle after this slot's status has updated and onStatusChange callback invoked.
A SegmentSlot is a holder for a segment buffer. It may be requested, cleared, and its status observed.