* ForwardingObject#delegate}. {@code forwarderClass} is assumed to only implement one interface.
   */
  static <T extends ForwardingObject> void testForwardingObject(Class<T> forwarderClass) {
    List<Class<?>> interfaces = new ArrayList<>(Arrays.asList(forwarderClass.getInterfaces()));
    // Desugaring may introduce AutoCloseable as an extra interface.

   * ForwardingObject#delegate}. {@code forwarderClass} is assumed to only implement one interface.
   */
  static <T extends ForwardingObject> void testForwardingObject(Class<T> forwarderClass) {
    List<Class<?>> interfaces = new ArrayList<>(Arrays.asList(forwarderClass.getInterfaces()));
    // Desugaring may introduce AutoCloseable as an extra interface.

@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ForwardingBlockingQueueTest extends TestCase {
  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingBlockingQueue.class);
  }

/** Unit tests for {@link ForwardingFuture} */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ForwardingFutureTest extends TestCase {
  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingFuture.class);
  }

 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ForwardingObjectTesterTest extends TestCase {

  public void testFailsToForward() {
    try {
      ForwardingObjectTester.testForwardingObject(FailToForward.class);
    } catch (AssertionError | UnsupportedOperationException expected) {
      // UnsupportedOperationException is what we see on Android.
      return;
    }
    fail("Should have thrown");

 *
 * @author Emily Soldal
 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ForwardingBlockingDequeTest extends TestCase {

  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingBlockingDeque.class);
  }

@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ForwardingListeningExecutorServiceTest extends TestCase {
  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingListeningExecutorService.class);
  }

@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ForwardingListeningExecutorServiceTest extends TestCase {
  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingListeningExecutorService.class);
  }

 *
 * @author Emily Soldal
 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ForwardingBlockingDequeTest extends TestCase {

  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingBlockingDeque.class);
  }

 *
 * @author Ben Yu
 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ForwardingListenableFutureTest extends TestCase {
  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingListenableFuture.class);
  }