docs: public void setParams(final Map<String, String> params) {
      // check "format y" and "format y2"
      String[] y_format_keys = {"format y", "format y2"};
      for(String k : y_format_keys){
        if(params.containsKey(k)){
          params.put(k, URLDecoder.decode(params.get(k)));
        }
      }
      this.params = params;
    }