Backport improvements of wrapping infastructure for `vtkSmartPointer`
This MR backports improvements of the Python wrapping infrastructure that affects APIs that contain vtkSmartPointer<T>
and std::vector<vtkSmartPointer<T>>
This MR backports improvements of the Python wrapping infrastructure that affects APIs that contain vtkSmartPointer<T>
and std::vector<vtkSmartPointer<T>>