@Override
  public UnmodifiableIterator<E> iterator() {
    return listIterator();
  }

  @Override
  public ImmutableList<E> subList(int fromIndex, int toIndex) {
    return unsafeDelegateList(Lists.subListImpl(this, fromIndex, toIndex));
  }

  @Override
  public UnmodifiableListIterator<E> listIterator() {
    return listIterator(0);
  }

  @Override

    return new AbstractListWrapper<>(list).listIterator(index);
  }

  /** An implementation of {@link List#subList(int, int)}. */
  static <E extends @Nullable Object> List<E> subListImpl(
      final List<E> list, int fromIndex, int toIndex) {
    List<E> wrapper;
    if (list instanceof RandomAccess) {
      wrapper =
          new RandomAccessListWrapper<E>(list) {
            @Override