Union[List[str], None]: Fields defining clustering for the table

        (Defaults to :data:`None`).

def clustering_fields(self, value):
        """Union[List[str], None]: Fields defining clustering for the table

        (Defaults to :data:`None`).
        """
        if value is not None:
            prop = self._properties.setdefault("clustering", {})
            prop["fields"] = value
        else:
            if "clustering" in self._properties:
                del self._properties["clustering"]