code: def outline(dataset, generate_faces=False):
          
          alg = vtk.vtkOutlineFilter()
          alg.SetInputDataObject(dataset)
          alg.SetGenerateFaces(generate_faces)
          alg.Update()
          return wrap(alg.GetOutputDataObject(0))
docs: Produces an outline of the full extent for the input dataset.
  
          Parameters
          ----------
          generate_faces : bool, optional
              Generate solid faces for the box. This is off by default