code: private Unmarshaller getUnMarshaller(final MarshallerFactory marshallerFactory, final ClassResolver classResolver)
              throws IOException {
          final MarshallingConfiguration marshallingConfiguration = new MarshallingConfiguration();
          marshallingConfiguration.setVersion(2);
          marshallingConfiguration.setClassResolver(classResolver);
          return marshallerFactory.createUnmarshaller(marshallingConfiguration);
      }
docs: Creates and returns a {@link Unmarshaller}
  
  
  @param marshallerFactory The marshaller factory
  @return
  @throws IOException