*/
  @J2ktIncompatible
  @GwtIncompatible // java.time.Duration
  public static ScheduledExecutorService getExitingScheduledExecutorService(
      ScheduledThreadPoolExecutor executor, Duration terminationTimeout) {
    return getExitingScheduledExecutorService(
        executor, toNanosSaturated(terminationTimeout), TimeUnit.NANOSECONDS);
  }

  /**

    TestApplication application = new TestApplication();
    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1);
    assertNotNull(application.getExitingScheduledExecutorService(executor));
    assertTrue(executor.getThreadFactory().newThread(EMPTY_RUNNABLE).isDaemon());
  }

  @AndroidIncompatible // Mocking ExecutorService is forbidden there. TODO(b/218700094): Don't mock.

    TestApplication application = new TestApplication();
    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1);
    assertNotNull(application.getExitingScheduledExecutorService(executor));
    assertTrue(executor.getThreadFactory().newThread(EMPTY_RUNNABLE).isDaemon());
  }

  @AndroidIncompatible // Mocking ExecutorService is forbidden there. TODO(b/218700094): Don't mock.