protected final void tearDown() {
    tearDownStack.runTearDown();
  }

  private String enter() {
    return interruptible ? "enterInterruptibly" : "enter";
  }

  private String tryEnter() {
    return "tryEnter";
  }

  private String enterIf() {
    return interruptible ? "enterIfInterruptibly" : "enterIf";
  }

  private String tryEnterIf() {
    return "tryEnterIf";
  }

  protected final void tearDown() {
    tearDownStack.runTearDown();
  }

  private String enter() {
    return interruptible ? "enterInterruptibly" : "enter";
  }

  private String tryEnter() {
    return "tryEnter";
  }

  private String enterIf() {
    return interruptible ? "enterIfInterruptibly" : "enterIf";
  }

  private String tryEnterIf() {
    return "tryEnterIf";
  }

   */
  @CanIgnoreReturnValue
  @Override
  public boolean offer(E e) {
    if (e == null) throw new NullPointerException();
    final Monitor monitor = this.monitor;
    if (monitor.enterIf(notFull)) {
      try {
        insert(e);
        return true;
      } finally {
        monitor.leave();
      }
    } else {
      return false;
    }
  }

  /**

   */
  @CanIgnoreReturnValue
  @Override
  public boolean offer(E e) {
    if (e == null) throw new NullPointerException();
    final Monitor monitor = this.monitor;
    if (monitor.enterIf(notFull)) {
      try {
        insert(e);
        return true;
      } finally {
        monitor.leave();
      }
    } else {
      return false;
    }
  }

  /**

      }
    };
  }

  /** Enters this monitor. Blocks indefinitely. */
  public void enter() {
    lock.lock();
  }

  /**
   * Enters this monitor. Blocks at most the given time.
   *
   * @return whether the monitor was entered
   * @since 28.0
   */
  public boolean enter(Duration time) {
    return enter(toNanosSaturated(time), TimeUnit.NANOSECONDS);
  }

  /**

   *
   * @since 27.0
   */
  @ForOverride
  protected void doCancelStart() {}

  @CanIgnoreReturnValue
  @Override
  public final Service startAsync() {
    if (monitor.enterIf(isStartable)) {
      try {
        snapshot = new StateSnapshot(STARTING);
        enqueueStartingEvent();
        doStart();
      } catch (Throwable startupFailure) {

   *
   * @since 27.0
   */
  @ForOverride
  protected void doCancelStart() {}

  @CanIgnoreReturnValue
  @Override
  public final Service startAsync() {
    if (monitor.enterIf(isStartable)) {
      try {
        snapshot = new StateSnapshot(STARTING);
        enqueueStartingEvent();
        doStart();
      } catch (Throwable startupFailure) {

    this.lock = new ReentrantLock(fair);
  }

  /** Enters this monitor. Blocks indefinitely. */
  public void enter() {
    lock.lock();
  }

  /**
   * Enters this monitor. Blocks at most the given time.
   *
   * @return whether the monitor was entered
   */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  public boolean enter(long time, TimeUnit unit) {

   * methods that do not take an explicit timeout value, a single test case is generated only if the
   * implicit timeout of that method matches the given timeoutsToUse. For example, enter() is
   * treated like enter(MAX, MILLIS) and tryEnter() is treated like enter(0, MILLIS).
   */
  private static void addTests(
      TestSuite suite,
      Method method,
      Scenario scenario,
      TimeoutsToUse timeoutsToUse,

   * methods that do not take an explicit timeout value, a single test case is generated only if the
   * implicit timeout of that method matches the given timeoutsToUse. For example, enter() is
   * treated like enter(MAX, MILLIS) and tryEnter() is treated like enter(0, MILLIS).
   */
  private static void addTests(
      TestSuite suite,
      Method method,
      Scenario scenario,
      TimeoutsToUse timeoutsToUse,