vtkNew<vtkMultiPieceDataSet> Cache;
std::vector<vtkSmartPointer<vtkIdList> > CellToCopyFrom;
std::vector<vtkSmartPointer<vtkIdList> > CellToCopyTo;
vtkNew<vtkMultiPieceDataSet> Cache;
std::vector<vtkSmartPointer<vtkIdList> > CellToCopyFrom;
std::vector<vtkSmartPointer<vtkIdList> > CellToCopyTo;