what's the meaning of order and tt_cores in lp.py

[Flyfoxs]

there are two fileds in class LP(nn.Module), but i read the class many times. still cannot get what's the meaning of them.

    self.tt_cores = []

    if order is None:
        self.order = list(range(len(distr_descr)))
    else:
        self.order = order