Unless AllowOverdraft is true, the amount of tokens requested must be smaller than the burst size. If AllowOverdraft is false and
there is insufficient ballance, or if AllowOverdraft is true but the ballance is negative, then the requester is paused until all
prior reuqesters have been served and the ballance is high enough to serve the current request.
Withdraw tokens from the bucket.
Unless AllowOverdraft is true, the amount of tokens requested must be smaller than the burst size. If AllowOverdraft is false and there is insufficient ballance, or if AllowOverdraft is true but the ballance is negative, then the requester is paused until all prior reuqesters have been served and the ballance is high enough to serve the current request.