def metadata(self):
        """Get the metadata of the feature.

        Returns
        -------
        Dict
            The metadata of the feature.
        """
        return (
            self._metadata if self._metadata is not None else super().metadata()
        )
Get the metadata of the feature.

        Returns
        -------
        Dict
            The metadata of the feature.
        
python/dgl/graphbolt/impl/torch_based_feature_store.py