nt-weight: bold;">source_category</span>()
const </td>
            <td>Returns input site category among the other sites.<br>
Allows to distinguish between segment site and its endpoints. </td>
          </tr>
          <tr>
            <td style="font-family: Courier New,Courier,monospace;">voronoi_edge_type*
            <span style="font-weight: bold;">incident_edge</span>() </td>
            <td>Returns the pointer to the
one of the boundary edges. </td>
          </tr>
          <tr>
            <td sty