docs: public static <E> E argmax(Counter<E> c) {
      double max = Double.NEGATIVE_INFINITY;
      E argmax = null;
      for (E key : c.keySet()) {
        double count = c.getCount(key);
        if (argmax == null || count > max) {// || (count == max &&
                                            // tieBreaker.compare(key, argmax) <
                                            // 0)) {
          max = count;
          argmax = key;
        }
      }
      return argmax;
    }