code: public static MessageDto notifyGroup(NotifyGroupParams notifyGroupParams) {
          MessageDto msg = new MessageDto();
          msg.setGroupId(notifyGroupParams.getGroupId());
          msg.setAction(MessageConstants.ACTION_NOTIFY_GROUP);
          msg.setData(notifyGroupParams);
          return msg;
      }
docs: 关闭事务组
  
  @param notifyGroupParams notifyGroupParams
  @return MessageDto