friend std::ostream & operator <<(std::ostream & OS, const SMDS_MeshElement *);
friend bool SMDS_MeshElementIDFactory::BindID(int ID,SMDS_MeshElement*elem);
friend std::ostream & operator <<(std::ostream & OS, const SMDS_MeshElement *);
friend bool SMDS_MeshElementIDFactory::BindID(int ID,SMDS_MeshElement*elem);