Function when

fdbserver/Status.actor.cpp:1337–1344

			}
		}
		when(wait(delay(timeoutSeconds))) {
			if (isAvailable != nullptr) {
				*isAvailable = false;
			}
			messages->push_back(
			    JsonString::makeMessage(format("%s_probe_timeout", prefix).c_str(),
			                            format("Unable to %s after %d seconds.", description, timeoutSeconds).c_str()));
		}
	}

	return Void();