code: public Counter<L> scoresOf(int[] features) {
      Counter<L> scores = new ClassicCounter<L>();
      for (L label : labels())
        scores.setCount(label, scoreOf(features, label));
      return scores;
    }
docs: Given a datum's features, construct a counter with keys
  the labels and values the score (unnormalized log probability)
  for each class.