@RequestMapping(value = "/groups/list", method = RequestMethod.GET)
  public ResponseEntity<List<SearchInfo>> getGroupList(@RequestParam Integer size,
      @RequestParam(required = false) String search) throws UnsupportedEncodingException {
    search = URLDecoder.decode(search, StandardCharsets.UTF_8.name());
    List<SearchInfo> result = service.getGroupList(size, search);
    return new ResponseEntity<>(result, OK);
  }