gt; &gt;::front </td>
          <td>(</td>
          <td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
          <td> const</td>
        </tr>
      </table>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">nodiscard</span><span class="mlabel">noexcept</span></span>  </td>
  </tr>
</table>
</div><div class="memdoc">

<p>Returns the first entity of the group, if any. </p>
<dl class="section return"><dt>Returns</dt><d