Adds a suspendable to the list of suspendables which are to be throttled if it's not already in there. Also ensures that the state of the added suspendable is consistent with the state of the throttler.
suspendable
See Implementation
Adds a suspendable to the list of suspendables which are to be throttled if it's not already in there. Also ensures that the state of the added suspendable is consistent with the state of the throttler.