}

    private int reverseIndex(int index) {
      return (size() - 1) - index;
    }

    private int reversePosition(int index) {
      return size() - index;
    }

    @Override
    public ImmutableList<E> reverse() {
      return forwardList;
    }

    @Override
    public boolean contains(@CheckForNull Object object) {
      return forwardList.contains(object);
    }

    @Override