+ /**
+ * \brief return the list of face groups ids
+ * @return _faceGroupsIds
+ */
+ std::vector< std::vector<int> > getFaceGroups( void ) const ;
+
+ /**
+ * \brief return the list of node groups Ids
+ * @return _nodeGroupsIds
+ */
+ std::vector< std::vector<int> > getNodeGroups( void ) const ;
+