def _handle_order_args(self, rison_args: Dict[str, Any]) -> Tuple[str, str]:
        """
        Help function to handle rison order
        arguments

        :param rison_args:
        :return:
        """
        order_column = rison_args.get(API_ORDER_COLUMN_RIS_KEY, "")
        order_direction = rison_args.get(API_ORDER_DIRECTION_RIS_KEY, "")
        if not order_column and self.base_order:
            return self.base_order
        if not order_column:
            return "", ""
        elif self.order_columns and order_column not in self.order_columns:
            raise InvalidOrderByColumnFABException(
                f"Invalid order by column: {order_column}"
            )
        return order_column, order_direction

        Help function to handle rison order
        arguments

        :param rison_args:
        :return:
        
flask_appbuilder/api/__init__.py