def batch_receive_message(num = 16, wait_seconds = 3)
      result = Request::Xml.get(messages_path, query: {waitseconds: wait_seconds, numOfMessages: num})
      return nil if result.nil?
      Result.new(self, result, "Messages", "Message").get_message
    end
def batch_receive_message(num = 16, wait_seconds = 3)
      result = Request::Xml.get(messages_path, query: {waitseconds: wait_seconds, numOfMessages: num})
      return nil if result.nil?
      Result.new(self, result, "Messages", "Message").get_message
    end
批量消费消息