* identify deadlocks.
   */
  @VisibleForTesting
  static final class Blocker extends AbstractOwnableSynchronizer implements Runnable {
    private final InterruptibleTask<?> task;

    private Blocker(InterruptibleTask<?> task) {
      this.task = task;
    }

    @Override
    public void run() {}

    private void setOwner(Thread thread) {
      super.setExclusiveOwnerThread(thread);

   * that the test isn't exposing a real problem with InterruptibleTask, one that could matter in
   * prod.
   */
  @AndroidIncompatible
  public void testInterruptIsSlow() throws Exception {
    CountDownLatch isInterruptibleRegistered = new CountDownLatch(1);
    SlowChannel slowChannel = new SlowChannel();
    InterruptibleTask<@Nullable Void> task =
        new InterruptibleTask<@Nullable Void>() {
          @Override

   * that the test isn't exposing a real problem with InterruptibleTask, one that could matter in
   * prod.
   */
  @AndroidIncompatible
  public void testInterruptIsSlow() throws Exception {
    CountDownLatch isInterruptibleRegistered = new CountDownLatch(1);
    SlowChannel slowChannel = new SlowChannel();
    InterruptibleTask<@Nullable Void> task =
        new InterruptibleTask<@Nullable Void>() {
          @Override