<li>\subpage free_edges_page "Free edges"</li>
<li>\subpage length_2d_page "Length 2D"</li>
<li>\subpage borders_at_multi_connection_2d_page "Borders at multi-connection 2D"</li>
<li>\subpage free_edges_page "Free edges"</li>
<li>\subpage length_2d_page "Length 2D"</li>
<li>\subpage borders_at_multi_connection_2d_page "Borders at multi-connection 2D"</li>