super(AbstractService.this.monitor);
    }

    @Override
    public boolean isSatisfied() {
      return state().compareTo(TERMINATED) >= 0;
    }
  }

  /** The listeners to notify during a state transition. */
  private final ListenerCallQueue<Listener> listeners = new ListenerCallQueue<>();

  /**
   * The current state of the service. This should be written with the lock held but can be read