docs: private LinearClassifier<L, L> fitSigmoid(SVMLightClassifier<L, F> classifier, GeneralDataset<L, F> dataset) {
      RVFDataset<L, L> plattDataset = new RVFDataset<L, L>();
      for (int i = 0; i < dataset.size(); i++) {
        RVFDatum<L, F> d = dataset.getRVFDatum(i);
        Counter<L> scores = classifier.scoresOf((Datum<L,F>)d);
        scores.incrementCount(null);
        plattDataset.add(new RVFDatum<L, L>(scores, d.label()));
      }
      LinearClassifierFactory<L, L> factory = new LinearClassifierFactory<L, L>();
      factory.setPrior(new LogPrior(LogPrior.LogPriorType.NULL));
      return factory.trainClassifier(plattDataset);
    }