needed and is available to the library user who finds it
convenient to use a library polygon data type instead of providing
their own.&nbsp; The data type is implemented to be convenient to use
with the library traits.</p>
      <h2>Members</h2>
      <table id="table2" border="1" width="100%">
        <tbody>
          <tr>
            <td width="586"><b><font face="Courier New">geometry_type</font></b></td>
            <td><font face="Times New Roman">polygon_45_with_holes_concept</font></td>
          </