 geometry is valid
                      or not, and if not valid a reason why
                    </p>
                  </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="geometry.reference.algorithms.is_valid.is_valid_2_with_message.h2"></a>
            <span class="phrase"><a name="geometry.reference.algorithms.is_valid.is_valid_2_with_message.returns"></a></span><a class="link" href="is_valid_2_with_message.html#geometry.reference.algorithms.is_valid.is_valid_2_with_message.returns">Returns</a>
        