public Long getIdByNumber(String number, Long appId) {
   return groupMapper.getIdByNumberAndAppId(number, appId);
 }
 public List<Group> getListByAppId(Long appId) {
   return groupMapper.getListByAppId(appId);
 }
 public int update(Group group) {
   return groupMapper.update(group);
 }
 public int delete(Group group) {
   return groupMapper.delete(group);
 }
 public void add(Group group) {
   groupMapper.add(group);
 }