docs: @Override
    public void write(TextWriterStream out, String label, DoubleDoublePair object) {
      if(object != null) {
        String res;
        if(label != null) {
          res = label + "=" + object.first + "," + object.second;
        }
        else {
          res = object.first + " " + object.second;
        }
        out.inlinePrintNoQuotes(res);
      }
    }