docs: def end_coordsys(self):
          """
          Coordinate system at end of effect.
  
          All axes are parallel to the original vector evaluation location, with
          the origin moved to this effect's end point.
  
          :return: coordinate system at end of effect
          :rtype: :class:`CoordSys`
          """
          coordsys = copy(self.location)
          coordsys.origin = self.end_point
          return coordsys