'Edges from a dual Gx_node in the mapping should be ordered in
a time-respecting manner.'

def test_two(self, pred_dates, succ_dates):

    time_respecting = True
    pred_dates.sort()
    succ_dates.sort()
    if ((0 < len(succ_dates)) and (0 < len(pred_dates)) and (succ_dates[0] < pred_dates[(-1)])):
        time_respecting = False
    return time_respecting
