code: def fill_holes(self, hole_size, inplace=False):  # pragma: no cover
          
          logging.warning('vtki.pointset.PolyData.fill_holes is known to segfault. ' +
                          'Use at your own risk')
          fill = vtk.vtkFillHolesFilter()
          fill.SetHoleSize(hole_size)
          fill.SetInputData(self)
          fill.Update()
  
          mesh = _get_output(fill)
          if inplace:
              self.overwrite(mesh)
          else:
              return mesh
docs: Fill holes in a vtki.PolyData or vtk.vtkPolyData object.
  
          Holes are identified by locating boundary edges, linking them together
          into loops, and then triangulating the resulting loops. Note that you
          can specify an approximate limit to the size of the hole that can be
          filled.
  
          Parameters
          ----------
          hole_size : float
              Specifies the maximum hole size to fill. This is represented as a
              radius to the bounding circumsphere containing the hole. Note that
              this is an approximate area; the actual area cannot be computed
              without first triangulating the hole.
  
          inplace : bool, optional
              Return new mesh or overwrite input.
  
          Returns
          -------
          mesh : vtki.PolyData
              Mesh with holes filled.  None when inplace=True