} else {
      return elementsEqual(thisList.iterator(), otherList.iterator());
    }
  }

  /** An implementation of {@link List#addAll(int, Collection)}. */
  static <E extends @Nullable Object> boolean addAllImpl(
      List<E> list, int index, Iterable<? extends E> elements) {
    boolean changed = false;
    ListIterator<E> listIterator = list.listIterator(index);
    for (E e : elements) {
      listIterator.add(e);