checkNotNull(collection);
      throw new IllegalArgumentException("Key does not satisfy predicate: " + key);
    }

    @Override
    protected Set<V> delegate() {
      return emptySet();
    }
  }

  private static final class AddRejectingList<
          K extends @Nullable Object, V extends @Nullable Object>
      extends ForwardingList<V> {

        when(delegate.hasNext()).thenReturn(false);
        NetServerFileEntryAdapterIterator itr = new NetServerFileEntryAdapterIterator(parent, delegate, null);

        // Act
        itr.remove();

        // Assert
        verify(delegate, times(1)).remove();
    }

    @Test
    @DisplayName("Edge: empty delegate yields no elements")
    void emptyDelegate_hasNoNext() {

    }
    return false;
  }

  // Assumes that delegate doesn't have null elements and comparator.
  static <E> ImmutableSortedSet<E> unsafeDelegateSortedSet(
      SortedSet<E> delegate, boolean isSubset) {
    return delegate.isEmpty()
        ? emptySet(delegate.comparator())
        : new RegularImmutableSortedSet<E>(delegate, isSubset);
  }

  private final transient SortedSet<E> sortedDelegate;

    delegate.awaitTerminated(timeout, unit);
  }

  interface Cancellable {
    void cancel(boolean mayInterruptIfRunning);

    boolean isCancelled();
  }

  private static final class FutureAsCancellable implements Cancellable {
    private final Future<?> delegate;

    FutureAsCancellable(Future<?> delegate) {
      this.delegate = delegate;
    }

    @Override

  /** Constructor for use by subclasses. */
  protected ForwardingNavigableSet() {}

  @Override
  protected abstract NavigableSet<E> delegate();

  @Override
  public @Nullable E lower(@ParametricNullness E e) {
    return delegate().lower(e);
  }

  /**
   * A sensible definition of {@link #lower} in terms of the {@code descendingIterator} method of

              public ListIterator<?> apply(ListIterator delegate) {
                return wrap((ListIterator<?>) delegate);
              }
            });
  }

  private static <T> ListIterator<T> wrap(ListIterator<T> delegate) {
    return new ForwardingListIterator<T>() {
      @Override
      protected ListIterator<T> delegate() {
        return delegate;
      }
    };
  }

                    + " the delegate) instead of forwarding to delegate.close()");
          }
        };
    ExecutorService wrapper =
        new ForwardingExecutorService() {
          @Override
          protected ExecutorService delegate() {
            return delegate;
          }
        };
    Method closeMethod;
    try {

    private final Lock delegate;

    @SuppressWarnings("unused")
    private final WeakSafeReadWriteLock strongReference;

    WeakSafeLock(Lock delegate, WeakSafeReadWriteLock strongReference) {
      this.delegate = delegate;
      this.strongReference = strongReference;
    }

    @Override
    Lock delegate() {
      return delegate;
    }

    @Override

      super(ForwardingSortedMultiset.this);
    }
  }

  @Override
  public Comparator<? super E> comparator() {
    return delegate().comparator();
  }

  @Override
  public SortedMultiset<E> descendingMultiset() {
    return delegate().descendingMultiset();
  }

  /**
   * A skeleton implementation of a descending multiset view. Normally, {@link

 * (API level 24).
 */
@IgnoreJRERequirement
internal class InsecureExtendedTrustManager(
  private val delegate: X509ExtendedTrustManager,
  private val insecureHosts: List<String>,
) : X509ExtendedTrustManager() {
  override fun getAcceptedIssuers(): Array<X509Certificate> = delegate.acceptedIssuers

  override fun checkServerTrusted(
    chain: Array<out X509Certificate>,
    authType: String,