protected Object delegate;

    public BaseObject() {}

    public BaseObject(Object delegate, BaseObject parent) {
        this.delegate = requireNonNull(delegate, "delegate cannot be null");
        this.childrenTracking = parent != null ? parent::replace : null;
    }

    public BaseObject(Object delegate, ChildrenTracking parent) {
        this.delegate = requireNonNull(delegate, "delegate cannot be null");

    private final Deque<E> delegate = Lists.newLinkedList();
    public final Object mutex = new Object[0]; // something Serializable

    @Override
    public boolean offer(E o) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.offer(o);
    }

    @Override
    public @Nullable E poll() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.poll();
    }

    @Override

        Thread.sleep(500); // to make sure queue is processed, cancellation applied

        Mockito.verify(delegate).transferInitiated(transferInitiatedEvent);
        Mockito.verify(delegate).transferStarted(transferStartedEvent);
        Mockito.verify(delegate).transferProgressed(transferProgressedEvent);
        Mockito.verify(delegate).transferSucceeded(transferSucceededEvent);
    }

    private static TransferEvent event(

      return delegate.equals(o);
    }

    @Override
    public int hashCode() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.hashCode();
    }

    @Override
    public int size() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.size();
    }

    @Override
    public boolean isEmpty() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.isEmpty();
    }

    }

    private LegacyLocalRepositoryManager(ArtifactRepository delegate) {
        this.delegate = Objects.requireNonNull(delegate, "delegate cannot be null");

        ArtifactRepositoryLayout layout = delegate.getLayout();
        repo = new LocalRepository(
                new File(delegate.getBasedir()),
                (layout != null) ? layout.getClass().getSimpleName() : "legacy");

        /*

  public static final class NavigableSetSubsetTestSetGenerator<E>
      extends SortedSetSubsetTestSetGenerator<E> {
    public NavigableSetSubsetTestSetGenerator(
        TestSortedSetGenerator<E> delegate, Bound to, Bound from) {
      super(delegate, to, from);
    }

    @Override
    NavigableSet<E> createSubSet(SortedSet<E> sortedSet, E firstExclusive, E lastExclusive) {
      NavigableSet<E> set = (NavigableSet<E>) sortedSet;

    private final SettingsStaxWriter delegate;

    public SettingsXpp3Writer() {
        delegate = new SettingsStaxWriter();
        delegate.setAddLocationInformation(false);
    }
    /**
     * Method setFileComment.
     *
     * @param fileComment a fileComment object.
     */
    public void setFileComment(String fileComment) {
        delegate.setFileComment(fileComment);
    }

    /**

public class SwitchableMetadataSource implements ArtifactMetadataSource {
    private ArtifactMetadataSource delegate;

    @Inject
    public SwitchableMetadataSource(@Named("test") ArtifactMetadataSource delegate) {
        this.delegate = delegate;
    }

    public void setDelegate(ArtifactMetadataSource delegate) {
        this.delegate = delegate;
    }

    @Override

    assertThat(future.setFuture(delegate)).isTrue();
    assertThat(future.cancel(true /* mayInterruptIfRunning */)).isTrue();
    assertCancelled(future, true);
    assertCancelled(delegate, true);
  }

  public void testSetFutureDelegateAlreadySuccessful() throws Exception {
    delegate.set(5);
    assertThat(future.setFuture(delegate)).isTrue();
    assertSuccessful(future, 5);
  }

    private final TestSortedSetGenerator<E> delegate;

    public SortedSetSubsetTestSetGenerator(
        TestSortedSetGenerator<E> delegate, Bound to, Bound from) {
      this.to = to;
      this.from = from;
      this.delegate = delegate;

      SortedSet<E> emptySet = delegate.create();
      this.comparator = emptySet.comparator();

      SampleElements<E> samples = delegate.samples();