message: Complete a comment.
diff: @@ -72,7 +72,9 @@ namespace RINGMesh {
  * @todo I do not think that it work for only else than region and layer
  * because if you remove something else, for instance a corner or a line
  * or a surface, the incident boundaries may still exist but you removed
  - * one of its boundaries... to handle in the future [BC].
  + * one of its boundaries... to handle in the future.
  + * In fact, the model can be still be valid since there is everything geometrically.
  + * But the incident entities which shared the removed mesh entity must be merged... [BC].
  */
  bool get_dependent_entities(
  std::set< gmme_id >& in_mesh_entities,
  