def METHOD_NAME(self, x='x', y='y', z='z',
                                                  vx='vx', vy='vy', vz='vz',
                                                  Lx='Lx', Ly='Ly', Lz='Lz',
                                                  propagate_uncertainties=False):
    kwargs = dict(**locals())
    kwargs.pop('self')
    return self.astro.cartesian_angular_momenta(inplace=True, **kwargs)