def METHOD_NAME(mf, frozen=None, mo_coeff=None, mo_occ=None):
    if isinstance(mf, scf.uhf.UHF):
        raise NotImplementedError
    elif isinstance(mf, scf.ghf.GHF):
        raise NotImplementedError
    else:
        return RQCISD(mf, frozen, mo_coeff, mo_occ)