   </tr>
          <tr>
            <td style="font-family: Courier New,Courier,monospace;">void
            <span style="font-weight: bold;">clear</span>() </td>
            <td>Removes all primitives from the Voronoi diagram. </td>
          </tr>
          <tr>
            <td style="font-family: Courier New,Courier,monospace;">const
cell_container_type&amp; <span style="font-weight: bold;">cells</span>()
const </td>
            <td>Returns the const
reference to the cell container. </td>
          </tr>