* fixed number of elements that may be retrieved by position. It does not support {@link #remove},
 * {@link #set}, or {@link #add}.
 *
 * @author Jared Levy
 */
@GwtCompatible
abstract class AbstractIndexedListIterator<E extends @Nullable Object>
    extends UnmodifiableListIterator<E> {
  private final int size;
  private int position;

 * fixed number of elements that may be retrieved by position. It does not support {@link #remove},
 * {@link #set}, or {@link #add}.
 *
 * @author Jared Levy
 */
@GwtCompatible
abstract class AbstractIndexedListIterator<E extends @Nullable Object>
    extends UnmodifiableListIterator<E> {
  private final int size;
  private int position;

          return ArrayMap.this.setValue(index, value);
        }
      };
    }

    @Override
    Iterator<Entry<K, V>> entryIterator() {
      return new AbstractIndexedListIterator<Entry<K, V>>(size()) {
        @Override
        protected Entry<K, V> get(int index) {
          return getEntry(index);
        }
      };
    }

          return ArrayMap.this.setValue(index, value);
        }
      };
    }

    @Override
    Iterator<Entry<K, V>> entryIterator() {
      return new AbstractIndexedListIterator<Entry<K, V>>(size()) {
        @Override
        protected Entry<K, V> get(int index) {
          return getEntry(index);
        }
      };
    }

    @Override

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

  @Override
  public UnmodifiableListIterator<E> listIterator(int index) {
    return new AbstractIndexedListIterator<E>(size(), index) {
      @Override
      protected E get(int index) {
        return ImmutableList.this.get(index);
      }
    };
  }

  @Override
  public ImmutableList<E> asList() {

  private static final UnmodifiableListIterator<Object> EMPTY_ITR =
      new Itr<Object>(RegularImmutableList.EMPTY, 0);

  private static final class Itr<E> extends AbstractIndexedListIterator<E> {
    private final ImmutableList<E> list;

    Itr(ImmutableList<E> list, int index) {
      super(list.size(), index);
      this.list = list;
    }

    @Override

      @Override
      public Iterator<T> iterator() {
        return Iterators.concat(
            /* lazily generate the iterators on each input only as needed */
            new AbstractIndexedListIterator<Iterator<? extends T>>(inputs.length) {
              @Override
              public Iterator<? extends T> get(int i) {
                return inputs[i].iterator();
              }
            });
      }

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

  @Override
  public UnmodifiableListIterator<E> listIterator(int index) {
    return new AbstractIndexedListIterator<E>(size(), index) {
      @Override
      protected E get(int index) {
        return ImmutableList.this.get(index);
      }
    };
  }

  @Override

    }

    @Override
    public boolean isEmpty() {
      return false;
    }

    @Override
    public Iterator<Set<E>> iterator() {
      return new AbstractIndexedListIterator<Set<E>>(size()) {
        @Override
        protected Set<E> get(int setBits) {
          return new SubSet<>(inputSet, setBits);
        }
      };
    }

    @Override

      return emptyListIterator();
    }
    return new ArrayItr<>(array, position);
  }

  private static final class ArrayItr<T extends @Nullable Object>
      extends AbstractIndexedListIterator<T> {
    static final UnmodifiableListIterator<Object> EMPTY = new ArrayItr<>(new Object[0], 0);

    private final T[] array;

    ArrayItr(T[] array, int position) {