def kwargs2args(self, kwargs_lens=None, kwargs_source=None, kwargs_lens_light=None, kwargs_ps=None, kwargs_cosmo=None):
        """
        inverse of getParam function
        :param kwargs_lens: keyword arguments depending on model options
        :param kwargs_source: keyword arguments depending on model options
        :return: tuple of parameters
        """

        args = self.lensParams.setParams(kwargs_lens)
        args += self.souceParams.setParams(kwargs_source)
        args += self.lensLightParams.setParams(kwargs_lens_light)
        args += self.pointSourceParams.setParams(kwargs_ps)
        args += self.cosmoParams.setParams(kwargs_cosmo)
        return args