}

  private static class NoOpThreadedService extends AbstractExecutionThreadService {
    final CountDownLatch latch = new CountDownLatch(1);

    @Override
    protected void run() throws Exception {
      latch.await();
    }

    @Override
    protected void triggerShutdown() {
      latch.countDown();
    }
  }

  private static class StartFailingService extends AbstractService {
    @Override

  }

  private static class NoOpThreadedService extends AbstractExecutionThreadService {
    final CountDownLatch latch = new CountDownLatch(1);

    @Override
    protected void run() throws Exception {
      latch.await();
    }

    @Override
    protected void triggerShutdown() {
      latch.countDown();
    }
  }

  private static class StartFailingService extends AbstractService {
    @Override