forwardIterator.previous();
          canRemoveOrSet = false;
        }

        @Override
        public boolean hasNext() {
          return forwardIterator.hasPrevious();
        }

        @Override
        public boolean hasPrevious() {
          return forwardIterator.hasNext();
        }

        @Override
        @ParametricNullness
        public T next() {
          if (!hasNext()) {

        next = current.next;
      }
      removeNode(current);
      current = null;
      expectedModCount = modCount;
    }

    @Override
    public boolean hasPrevious() {
      checkForConcurrentModification();
      return previous != null;
    }

    @CanIgnoreReturnValue
    @Override
    public Node<K, V> previous() {
      checkForConcurrentModification();

      }

      private ListIterator<V> getDelegateListIterator() {
        return (ListIterator<V>) getDelegateIterator();
      }

      @Override
      public boolean hasPrevious() {
        return getDelegateListIterator().hasPrevious();
      }

      @Override
      @ParametricNullness
      public V previous() {
        return getDelegateListIterator().previous();
      }

      @Override

    return () ->
        new Iterator<T>() {
          private final ListIterator<T> listIter = list.listIterator(list.size());

          @Override
          public boolean hasNext() {
            return listIter.hasPrevious();
          }

          @Override
          public T next() {
            return listIter.previous();
          }

          @Override
          public void remove() {

    assertEquals("4", iterator.previous());
    assertEquals("3", iterator.previous());
    assertEquals("2", iterator.previous());
    assertTrue(iterator.hasPrevious());
    assertEquals("1", iterator.previous());
    assertFalse(iterator.hasPrevious());
    assertEquals(-1, iterator.previousIndex());
    try {
      iterator.previous();
      fail("did not detect beginning of list");

  }

  @SuppressWarnings("DoNotCall")
  public void testEmptyListIterator() {
    ListIterator<String> iterator = Iterators.emptyListIterator();
    assertFalse(iterator.hasNext());
    assertFalse(iterator.hasPrevious());
    assertEquals(0, iterator.nextIndex());
    assertEquals(-1, iterator.previousIndex());
    assertThrows(NoSuchElementException.class, () -> iterator.next());

  }

  @SuppressWarnings("DoNotCall")
  public void testEmptyListIterator() {
    ListIterator<String> iterator = Iterators.emptyListIterator();
    assertFalse(iterator.hasNext());
    assertFalse(iterator.hasPrevious());
    assertEquals(0, iterator.nextIndex());
    assertEquals(-1, iterator.previousIndex());
    assertThrows(NoSuchElementException.class, () -> iterator.next());