Runnable runnable, @ParametricNullness V result) {
    return new ListenableFutureTask<>(runnable, result);
  }

  ListenableFutureTask(Callable<V> callable) {
    super(callable);
  }

  ListenableFutureTask(Runnable runnable, @ParametricNullness V result) {
    super(runnable, result);
  }

  @Override
  public void addListener(Runnable listener, Executor exec) {

   */
  @Override
  ListenableScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit);

  /**
   * Duration-based overload of {@link #schedule(Runnable, long, TimeUnit)}.
   *
   * @since 29.0
   */
  @J2ktIncompatible
  default ListenableScheduledFuture<?> schedule(Runnable command, Duration delay) {
    return schedule(command, toNanosSaturated(delay), TimeUnit.NANOSECONDS);
  }

  }

  @Override
  @SuppressWarnings("CatchingUnchecked") // sneaky checked exception
  public void runWithTimeout(Runnable runnable, long timeoutDuration, TimeUnit timeoutUnit) {
    checkNotNull(runnable);
    checkNotNull(timeoutUnit);
    try {
      runnable.run();
    } catch (Exception e) { // sneaky checked exception
      throw new UncheckedExecutionException(e);
    } catch (Error e) {

// instead of using an AtomicReferenceFieldUpdater. This reference stores Thread instances
// and DONE/INTERRUPTED - they have a common ancestor of Runnable.
abstract class InterruptibleTask<T extends @Nullable Object>
    extends AtomicReference<@Nullable Runnable> implements Runnable {
  static {
    // Prevent rare disastrous classloading in first call to LockSupport.park.
    // See: https://bugs.openjdk.org/browse/JDK-8074773

  private val busyQueues = mutableListOf<TaskQueue>()

  /** Queues not in [busyQueues] that have non-empty [TaskQueue.futureTasks]. */
  private val readyQueues = mutableListOf<TaskQueue>()

  private val runnable: Runnable =
    object : Runnable {
      override fun run() {
        var task: Task =
          withLock {
            runCallCount++
            awaitTaskToRun()
          } ?: return

   * Runnable}, and arrange that {@code get} will return the given result on successful completion.
   *
   * @param runnable the runnable task
   * @param result the result to return on successful completion. If you don't need a particular
   *     result, consider using constructions of the form: {@code ListenableFuture<?> f =
   *     ListenableFutureTask.create(runnable, null)}
   */

  public void testSameThreadScheduledExecutorWithException() throws InterruptedException {
    Runnable runnable =
        new Runnable() {
          @Override
          public void run() {
            throw new RuntimeException("Oh no!");
          }
        };

    Future<?> future = TestingExecutors.sameThreadScheduledExecutor().submit(runnable);
    assertThrows(ExecutionException.class, () -> future.get());
  }

  public void testSameThreadScheduledExecutorWithException() throws InterruptedException {
    Runnable runnable =
        new Runnable() {
          @Override
          public void run() {
            throw new RuntimeException("Oh no!");
          }
        };

    Future<?> future = TestingExecutors.sameThreadScheduledExecutor().submit(runnable);
    assertThrows(ExecutionException.class, () -> future.get());
  }

   */
  @CanIgnoreReturnValue // TODO(kak): consider removing this
  @Override
  protected final <T extends @Nullable Object> RunnableFuture<T> newTaskFor(
      Runnable runnable, @ParametricNullness T value) {
    return TrustedListenableFutureTask.create(runnable, value);
  }

  /**
   * @since 19.0 (present with return type {@code ListenableFutureTask} since 14.0)
   */
  @CanIgnoreReturnValue // TODO(kak): consider removing this

    AtomicBoolean cancellationSuccess = new AtomicBoolean();
    Runnable cancelRunnable =
        new Runnable() {
          @Override
          public void run() {
            cancellationSuccess.set(currentFuture.get().cancel(true));
            awaitUnchecked(barrier);
          }
        };
    Runnable setFutureCompleteSuccessfullyRunnable =
        new Runnable() {
          @Override
          public void run() {