JdkBackedImmutableSet(Set<?> delegate, ImmutableList<E> delegateList) {
    this.delegate = delegate;
    this.delegateList = delegateList;
  }

  @Override
  E get(int index) {
    return delegateList.get(index);
  }

  @Override
  public boolean contains(@CheckForNull Object object) {
    return delegate.contains(object);
  }

  @Override
  boolean isPartialView() {
    return false;
  }

      values.add(null);
    }

    this.values = values;
  }

  @Override
  final void collectOneValue(int index, @ParametricNullness V returnValue) {
    List<@Nullable Present<V>> localValues = values;
    if (localValues != null) {
      localValues.set(index, new Present<>(returnValue));
    }
  }

  @Override
  final void handleAllCompleted() {
    List<@Nullable Present<V>> localValues = values;

  }

  @Override
  public ImmutableSortedSet<E> elementSet() {
    return forward.elementSet().descendingSet();
  }

  @Override
  Entry<E> getEntry(int index) {
    return forward.entrySet().asList().reverse().get(index);
  }

  @Override
  public ImmutableSortedMultiset<E> descendingMultiset() {
    return forward;
  }

  @Override

    return map.keySpliterator();
  }

  @Override
  public boolean contains(@CheckForNull Object object) {
    return map.containsKey(object);
  }

  @Override
  K get(int index) {
    return map.entrySet().asList().get(index).getKey();
  }

  @Override
  public void forEach(Consumer<? super K> action) {
    checkNotNull(action);
    map.forEach((k, v) -> action.accept(k));
  }

  @Override

  @Override
  public ImmutableList<V> asList() {
    final ImmutableList<Entry<K, V>> entryList = map.entrySet().asList();
    return new ImmutableList<V>() {
      @Override
      public V get(int index) {
        return entryList.get(index).getValue();
      }

      @Override
      boolean isPartialView() {
        return true;
      }

      @Override
      public int size() {
        return entryList.size();

      return matcher.matches();
    }

    @Override
    public boolean find() {
      return matcher.find();
    }

    @Override
    public boolean find(int index) {
      return matcher.find(index);
    }

    @Override
    public String replaceAll(String replacement) {
      return matcher.replaceAll(replacement);
    }

    @Override
    public int end() {

    return delegateList().indexOf(object);
  }

  public int lastIndexOf(@Nullable Object object) {
    return delegateList().lastIndexOf(object);
  }

  public E get(int index) {
    return delegateList().get(index);
  }

  public ImmutableList<E> subList(int fromIndex, int toIndex) {
    return unsafeDelegateList(delegateList().subList(fromIndex, toIndex));
  }

  @Override
  public Object[] toArray() {

  @Override
  public ImmutableList<V> asList() {
    final ImmutableList<Entry<K, V>> entryList = map.entrySet().asList();
    return new ImmutableAsList<V>() {
      @Override
      public V get(int index) {
        return entryList.get(index).getValue();
      }

      @Override
      ImmutableCollection<V> delegateCollection() {
        return ImmutableMapValues.this;
      }

      // redeclare to help optimizers with b/310253115

    ImmutableSet<E> result = elementSet;
    return (result == null) ? elementSet = new ElementSet<>(entries, this) : result;
  }

  @Override
  Entry<E> getEntry(int index) {
    return entries.get(index);
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  public int size() {
    return Ints.saturatedCast(size);
  }

    expectContents(expected);
  }

  protected final void expectAdded(int index, E... elements) {
    expectAdded(index, Arrays.asList(elements));
  }

  protected final void expectAdded(int index, Collection<E> elements) {
    List<E> expected = Helpers.copyToList(getSampleElements());
    expected.addAll(index, elements);
    expectContents(expected);
  }

  /*