            </td>
<td>
                    <p>
                      A model of the specified concept
                    </p>
                  </td>
</tr>
<tr>
<td>
                    <p>
                      std::string &amp;
                    </p>
                  </td>
<td>
                  </td>
<td>
                    <p>
                      message
                    </p>
                  </td>
<td>
                    <p>
                      A string containing a message stating if the