* @since 33.4.0 (but since 28.0 in the JRE flavor)
   */
  @IgnoreJRERequirement // Users will use this only if they're already using Duration.
  public boolean enterWhenUninterruptibly(Guard guard, Duration time) {
    return enterWhenUninterruptibly(guard, toNanosSaturated(time), NANOSECONDS);
  }

  /**
   * Enters this monitor when the guard is satisfied. Blocks at most the given time, including both

  @Override
  public final void awaitRunning() {
    monitor.enterWhenUninterruptibly(hasReachedRunning);
    try {
      checkCurrentState(RUNNING);
    } finally {
      monitor.leave();
    }
  }

  @Override
  public final void awaitRunning(long timeout, TimeUnit unit) throws TimeoutException {
    if (monitor.enterWhenUninterruptibly(hasReachedRunning, timeout, unit)) {
      try {

      }
    }

    void addListener(Listener listener, Executor executor) {
      listeners.addListener(listener, executor);
    }

    void awaitHealthy() {
      monitor.enterWhenUninterruptibly(awaitHealthGuard);
      try {
        checkHealthy();
      } finally {
        monitor.leave();
      }
    }

    void awaitHealthy(long timeout, TimeUnit unit) throws TimeoutException {