message: Write a todo.
diff: @@ -854,6 +854,9 @@ namespace RINGMesh {
  protected:
  VolumeMesh() = default;
  private:
  + /// @TODO use find_cell_from_vertex function in geomodel_builder_geometry
  + /// (in the unnamed namespace, geomodel2d branch) which uses C++11 a lambda
  + /// function. BC.
  index_t find_first_cell_owing_vertex( index_t vertex_id_in_mesh ) const;
  protected:
  