       <td class="paramname"><em>key</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int(*)(const key_type &amp;, const data_type &amp;)&#160;</td>
          <td class="paramname"><em>cf</em> = <code>default_comparison_function</code>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td> const</td>
        </tr>
      </table>
</div><div class="memdoc">
<p>comparisonFunction must 