@property
    def schema(self):
        _schema = (
            self._schema
            if self._schema is not None
            else (pa.schema(self._features.type) if self._features is not None else None)
        )
        if self._disable_nullable and _schema is not None:
            _schema = pa.schema(pa.field(field.name, field.type, nullable=False) for field in _schema)
        return _schema if _schema is not None else []

    @staticmethod
    def _build_metadata(info: DatasetInfo, fingerprint: Optional[str] = None) -> Dict[str, str]:
        info_keys = ["features"]  # we can add support for more DatasetInfo keys in the future
        info_as_dict = asdict(info)
        metadata = {}
        metadata["info"] = {key: info_as_dict[key] for key in info_keys}
        if fingerprint is not None:
            metadata["fingerprint"] = fingerprint
        return {"huggingface": json.dumps(metadata)}