code: private Counter<L> probabilityOfRVFDatum(RVFDatum<L, F> example) {
      // NB: this duplicate method is needed so it calls the scoresOf method
      // with a RVFDatum signature
      Counter<L> scores = logProbabilityOfRVFDatum(example);
      for (L label : scores.keySet()) {
        scores.setCount(label, Math.exp(scores.getCount(label)));
      }
      return scores;
    }
docs: Returns a counter mapping from each class name to the probability of
  that class for a certain example.
  Looking at the the sum of each count v, should be 1.0.