vtkTableBasedClipDataSet

I am using vtkTableBasedClipDataSet to clip a vtkUnstructuredGrid. How can I determine which points in the output vtkUnstructuredGrid are newly generated?

This can be approximated using original point ids and interpolation but there is not clean way to do that, it would be easy to add though, feel free to open an issue: https://gitlab.kitware.com/vtk/vtk/-/issues