docs: public static Dataset<String, String> readSVMLightFormat(String filename, Index<String> featureIndex, Index<String> labelIndex, List<String> lines) {
      Dataset<String, String> dataset;
      try {
        dataset = new Dataset<String, String>(10, featureIndex, labelIndex);
        for (String line : ObjectBank.getLineIterator(new File(filename))) {
          if(lines != null)
            lines.add(line);
          dataset.add(svmLightLineToDatum(line));
        }
  
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
      return dataset;
    }