def METHOD_NAME(self):
    """
    Parameters
    ----------
    :param cards: the list of GRAV cards
    """
    if self.n:
        i = self.load_id.argsort()
        self.load_id = self.load_id[i]
        #self.node_id = self.node_id[i]
        self.coord_id = self.coord_id[i]
        self.scale = self.scale[i]
        self.N = self.N[i]
        self._cards = []
        self._comments = []