code: private Map<String,String[]> getMap()
    {
      if(_queryParameters != null)
        return _queryParameters;
  
      _queryParameters = new LinkedHashMap<String,String[]>();
      addQueryToMap(_query.toString());
  
      return _queryParameters;
    }
docs: Internal call that will return the map. If <code>null</code> then first
  populate it
  @return the map