MEDCOUPLING_EXPORT virtual DataArrayInt *getNodeIdsInUse(int& nbrOfNodesInUse) const = 0;
MEDCOUPLING_EXPORT virtual void fillCellIdsToKeepFromNodeIds(const int *begin, const int *end, bool fullyIn, DataArrayInt *&cellIdsKeptArr) const = 0;
MEDCOUPLING_EXPORT virtual void renumberNodesInConn(const int *newNodeNumbersO2N) = 0;
MEDCOUPLING_EXPORT virtual DataArrayInt *getNodeIdsInUse(int& nbrOfNodesInUse) const = 0;
MEDCOUPLING_EXPORT virtual void fillCellIdsToKeepFromNodeIds(const int *begin, const int *end, bool fullyIn, DataArrayInt *&cellIdsKeptArr) const = 0;
MEDCOUPLING_EXPORT virtual void renumberNodesInConn(const int *newNodeNumbersO2N) = 0;