def maneuvers(self):
        """list of :py:class:`~beyond.orbits.man.Maneuver`: Maneuver descriptions usable by the
        propagator. Not all propagators can handle maneuvers. Check their respective documentations
        for more details.
        """
        mans = self.complements.setdefault('maneuvers', [])

        if isinstance(mans, Maneuver):
            mans = [mans]
            self.complements['maneuvers'] = mans

        return mans
list of :py:class:`~beyond.orbits.man.Maneuver`: Maneuver descriptions usable by the
        propagator. Not all propagators can handle maneuvers. Check their respective documentations
        for more details.