   </p>
                </th>
<th>
                <p>
                  element<br> sets
                </p>
                </th>
<th>
                <p>
                  element<br> maps
                </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="keyword">void</span> <span class="identifier">add_intersection</span><span class="special">(</span><span class="identifier">T</span><span class="special">&amp;,</sp