code: def simplify_spline(self, path_indexes=None, smooth=.0002):
          
          return simplify.simplify_spline(self,
                                          path_indexes=path_indexes,
                                          smooth=smooth)
docs: Convert paths into b-splines.
  
          Parameters
          -----------
          path_indexes : (n) int
            List of indexes of self.paths to convert
          smooth : float
            How much the spline should smooth the curve
  
          Returns
          ------------
          simplified: Path2D object