template<class CellPointExtractor>
vtkDataSet *FilterFamilies(vtkDataSet *input, const std::set<int>& idsToKeep, bool insideOut, const char *arrNameOfFamilyField,
const char *associationForThreshold, bool& catchAll, bool& catchSmth)
template<class CellPointExtractor>
vtkDataSet *FilterFamilies(vtkDataSet *input, const std::set<int>& idsToKeep, bool insideOut, const char *arrNameOfFamilyField,
const char *associationForThreshold, bool& catchAll, bool& catchSmth)