docs: public ParameterList getQueryStringParams() {
          try {
              final ParameterList result = new ParameterList();
              final String queryString = new URL(url).getQuery();
              result.addQuerystring(queryString);
              result.addAll(querystringParams);
              return result;
          } catch (MalformedURLException mue) {
              throw new OAuthException("Malformed URL", mue);
          }
      }