    <li>
        <a href="#deref">Dereference Operators and Iterator Helpers</a>

        <ul>
          <li><a href="#dereference">Dereference operators</a></li>

          <li><a href="#grpd_iter_oprs">Grouped Iterator Operators</a></li>

          <li>
            <a href="#iterator">Iterator Helpers</a>

            <ul>
              <li><a href="#iterator_helpers_notes">Iterator Helper
              Notes</a></li>
            </ul>
          </li>

          <li><a href="#i_demo">Iterator Demonstratio