docs: public String[] domainList(String bucket) throws QiniuException {
          String url = String.format("%s/v6/domain/list?tbl=%s", configuration.apiHost(), bucket);
          Response res = get(url);
          if (!res.isOK()) {
              throw new QiniuException(res);
          }
          String[] domains = res.jsonToObject(String[].class);
          res.close();
          return domains;
      }