Method holdRefUntilStopped

fdbserver/coroimpl/CoroFlow.actor.cpp:138–143

		}

		ACTOR Future<Void> holdRefUntilStopped(Pool* p) {
			p->addref();
			wait(p->allStopped.getResult());
			p->delref();
			return Void();
		}
	};

	struct Worker final : Threadlike {