@property
    def slice_dim(self):
        return self._content['dcmmeta_slice_dim']
We put flush lists in the flush: namespace.
dataset/ETHPy150Open moloney/dcmstack/src/dcmstack/dcmmeta.py/DcmMetaExtension.slice_dim--crossover with--dataset/ETHPy150Open django-cache-machine/django-cache-machine/caching/invalidation.py/flush_key