* overhead of constructing a {@link Function} for internal methods.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
abstract class TransformedListIterator<F extends @Nullable Object, T extends @Nullable Object>
    extends TransformedIterator<F, T> implements ListIterator<T> {
  TransformedListIterator(ListIterator<? extends F> backingIterator) {
    super(backingIterator);
  }

  private ListIterator<? extends F> backingIterator() {

 * overhead of constructing a {@link Function} for internal methods.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
abstract class TransformedListIterator<F extends @Nullable Object, T extends @Nullable Object>
    extends TransformedIterator<F, T> implements ListIterator<T> {
  TransformedListIterator(ListIterator<? extends F> backingIterator) {
    super(backingIterator);
  }

  private ListIterator<? extends F> backingIterator() {

    }

    @Override
    public boolean isEmpty() {
      return fromList.isEmpty();
    }

    @Override
    public ListIterator<T> listIterator(int index) {
      return new TransformedListIterator<F, T>(fromList.listIterator(index)) {
        @Override
        @ParametricNullness
        T transform(@ParametricNullness F from) {
          return function.apply(from);
        }
      };
    }

    }

    @Override
    public boolean isEmpty() {
      return fromList.isEmpty();
    }

    @Override
    public ListIterator<T> listIterator(int index) {
      return new TransformedListIterator<F, T>(fromList.listIterator(index)) {
        @Override
        @ParametricNullness
        T transform(@ParametricNullness F from) {
          return function.apply(from);
        }
      };
    }

      public int size() {
        return size;
      }

      @Override
      public ListIterator<V> listIterator(int index) {
        NodeIterator nodeItr = new NodeIterator(index);
        return new TransformedListIterator<Entry<K, V>, V>(nodeItr) {
          @Override
          @ParametricNullness
          V transform(Entry<K, V> entry) {
            return entry.getValue();
          }

          @Override

      public int size() {
        return size;
      }

      @Override
      public ListIterator<V> listIterator(int index) {
        NodeIterator nodeItr = new NodeIterator(index);
        return new TransformedListIterator<Entry<K, V>, V>(nodeItr) {
          @Override
          @ParametricNullness
          V transform(Entry<K, V> entry) {
            return entry.getValue();
          }

          @Override