@classmethod
    @memoized
    def calc_meta(cls):
        return cls.calc_mapping_hash({
            'es_meta': cls.es_meta,
            'mapping': cls.default_mapping,
        })
override of the meta calculator since we're separating out all the types,
dataset/ETHPy150Open dimagi/commcare-hq/corehq/pillows/case.py/CasePillow.calc_meta