`GetEdgePoints` and `GetFacePoints` not implemented in vtkPolyhedron
vtkCell3D::GetEdgePoints
and vtkCell3D::GetFacePoints
are pure virtual methods which are not implemented in vtkPolyhedron
. I added a warning macro for when they are called in !5996 (merged) so someone using them is aware that he should not use them, but it should be implemented at some point.