/** Unit tests for {@link ForwardingBlockingQueue} */
@NullUnmarked
public class ForwardingBlockingQueueTest extends TestCase {
  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingBlockingQueue.class);
  }

import org.jspecify.annotations.NullUnmarked;

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

   * 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.