private final CountDownLatch runLatch = new CountDownLatch(1);
  private final CountDownLatch taskLatch = new CountDownLatch(1);
  private final CountDownLatch listenerLatch = new CountDownLatch(1);

  private volatile boolean throwException = false;

  private final ListenableFutureTask<Integer> task =
      ListenableFutureTask.create(
          () -> {
            runLatch.countDown();
            taskLatch.await();

  private final CountDownLatch runLatch = new CountDownLatch(1);
  private final CountDownLatch taskLatch = new CountDownLatch(1);
  private final CountDownLatch listenerLatch = new CountDownLatch(1);

  private volatile boolean throwException = false;

  private final ListenableFutureTask<Integer> task =
      ListenableFutureTask.create(
          () -> {
            runLatch.countDown();
            taskLatch.await();

    *   Promoting `tf.data.experimental.enumerate_dataset` to core as
        `tf.data.Dataset.enumerate`.
    *   Promoting `tf.data.experimental.unbatch` to core as
        `tf.data.Dataset.unbatch`.
    *   Adds option for introducing slack in the pipeline to reduce CPU
        contention, via `tf.data.Options().experimental_slack = True`