@classmethod
def check_positive_flux(cls, kwargs_ps):
    """
        check whether inferred linear parameters are positive

        :param kwargs_ps:
        :return: bool
        """
    pos_bool = True
    for kwargs in kwargs_ps:
        point_amp = kwargs['point_amp']
        for amp in point_amp:
            if amp < 0:
                pos_bool = False
                break
    return pos_bool
