return "running()";
        }
      };
  private static final ListenerCallQueue.Event<Listener> STOPPING_FROM_STARTING_EVENT =
      stoppingEvent(STARTING);
  private static final ListenerCallQueue.Event<Listener> STOPPING_FROM_RUNNING_EVENT =
      stoppingEvent(RUNNING);

  private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_NEW_EVENT =
      terminatedEvent(NEW);