code: public GetGroupsResponse getGroups() {
          GetGroupsResponse response;
          LOG.debug("获取所有分组信息.....");
          String url = BASE_API_URL + "cgi-bin/groups/get?access_token=#";
          BaseResponse r = executeGet(url);
          String resultJson = isSuccess(r.getErrcode()) ? r.getErrmsg() : r.toJsonString();
          response = JSONUtil.toBean(resultJson, GetGroupsResponse.class);
          return response;
      }
docs: 获取所有分组信息
  
  @return 所有分组信息列表对象