docs: public String getRecallDescription(int numDigits) {
      NumberFormat nf = NumberFormat.getNumberInstance();
      nf.setMaximumFractionDigits(numDigits);
      Triple<Double, Integer, Integer> recall = getRecallInfo();
      return nf.format(recall.first()) + "  (" + recall.second() + "/" + (recall.second() + recall.third()) + ")";
    }