def METHOD_NAME(self):
    """
    check that summing sub_dim * sub_mult over rows with a given label gives dim S_k(Gamma1(N))
    """
    # TIME about 1s
    return self.check_crosstable_dotprod('mf_gamma1_subspaces', 'cusp_dim', 'label', ['sub_mult', 'sub_dim'])