@Override
 protected void unpackageClassifier(JarInputStream modelStream) throws IOException {
   super.unpackageClassifier(modelStream);
   JarStreams.getNextJarEntry(modelStream, MODEL_NAME);
   ObjectInputStream objectStream = new ObjectInputStream(modelStream);
   try {
     this.classifier = (Classifier) objectStream.readObject();
   } catch (ClassNotFoundException e) {
     throw new IOException(e);
   }
 }