def _get_all_state_from_cache(self, group):
        is_all, state_dict_ids = self._state_group_cache.get(group)

        return state_dict_ids, is_all
Checks if group is in cache. See `_get_state_for_groups`
dataset/ETHPy150Open matrix-org/synapse/synapse/storage/state.py/StateStore._get_all_state_from_cache