code: def order_by(self, field_path, **kwargs):
          
          query = query_mod.Query(self)
          return query.order_by(field_path, **kwargs)
docs: Create an "order by" query with this collection as parent.
  
          See
          :meth:`~.firestore_v1beta1.query.Query.order_by` for
          more information on this method.
  
          Args:
              field_path (str): A field path (``.``-delimited list of
                  field names) on which to order the query results.
              kwargs (Dict[str, Any]): The keyword arguments to pass along
                  to the query. The only supported keyword is ``direction``,
                  see :meth:`~.firestore_v1beta1.query.Query.order_by` for
                  more information.
  
          Returns:
              ~.firestore_v1beta1.query.Query: An "order by" query.