code: def clustering_fields(self, value):
          
          if value is not None:
              prop = self._properties.setdefault("clustering", {})
              prop["fields"] = value
          else:
              if "clustering" in self._properties:
                  del self._properties["clustering"]
docs: Union[List[str], None]: Fields defining clustering for the table
  
          (Defaults to :data:`None`).