public int indexOf(@Nullable Object object) {
      int index = forwardList.lastIndexOf(object);
      return (index >= 0) ? reverseIndex(index) : -1;
    }

    @Override
    public int lastIndexOf(@Nullable Object object) {
      int index = forwardList.indexOf(object);
      return (index >= 0) ? reverseIndex(index) : -1;
    }

    @Override
    public ImmutableList<E> subList(int fromIndex, int toIndex) {

    public T remove(int index) {
      return forwardList.remove(reverseIndex(index));
    }

    @Override
    protected void removeRange(int fromIndex, int toIndex) {
      subList(fromIndex, toIndex).clear();
    }

    @Override
    @ParametricNullness
    public T set(int index, @ParametricNullness T element) {
      return forwardList.set(reverseIndex(index), element);
    }

    @Override