def METHOD_NAME(self, theta_E, gamma, e1, e2, a_m, center_x=0, center_y=0):
    # this function converts a given parameter set of EPL_BOXYDISKY into two parameter sets; one for EPL and the
    # other for Multipole with m=4.
    phi, _ = param_util.ellipticity2phi_q(e1, e2)
    kwargs_epl = {
        "theta_E": theta_E,
        "gamma": gamma,
        "e1": e1,
        "e2": e2,
        "center_x": center_x,
        "center_y": center_y,
    }
    kwargs_multipole = {
        "m": self._m,
        "a_m": a_m,
        "phi_m": phi,
        "center_x": center_x,
        "center_y": center_y,
    }
    return kwargs_epl, kwargs_multipole