code: @Beta
    protected List<E> standardSubList(int fromIndex, int toIndex) {
      return Lists.subListImpl(this, fromIndex, toIndex);
    }
docs: A sensible default implementation of {@link #subList(int, int)}. If you override any other
  methods, you may wish to override {@link #subList(int, int)} to forward to this implementation.
  
  @since 7.0