@property
    @memoized
    def users_needing_data(self):
        ids = set(self.user_to_case_map.keys()) - set(self.cached_data.keys())
        return ids
:return: Set of user_ids for whom we need to generate data
dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/callcenter/indicator_sets.py/CallCenterIndicators.users_needing_data