code: def order_by_raw(self, sql, bindings=None):
          
          if bindings is None:
              bindings = []
  
          type = "raw"
  
          self.orders.append({"type": type, "sql": sql})
  
          self.add_binding(bindings, "order")
  
          return self
docs: Add a raw "order by" clause to the query
  
          :param sql: The raw clause
          :type sql: str
  
          :param bindings: The bdings
          :param bindings: list
  
          :return: The current QueryBuilder instance
          :rtype: QueryBuilder