def liftover_using_gnomad_map(ht, data_type):
    """
    Liftover a gnomAD table using already-established liftover file. Warning: shuffles!

    :param ht: Input Hail table
    :param data_type: one of "exomes" or "genomes" which to map across
    :return: Lifted over table
    """
    from gnomad.resources.grch37.gnomad import liftover
    lift_ht = liftover(data_type).ht()
    ht = ht.key_by(original_locus=ht.locus, original_alleles=ht.alleles).drop(
        'locus', 'alleles')
    return lift_ht.annotate(**ht[lift_ht.original_locus, lift_ht.
        original_alleles]).key_by('locus', 'alleles')
