code: public void addDefaultKryoSerializer(Class<?> type, Class<? extends Serializer<?>> serializerClass) {
  		config.addDefaultKryoSerializer(type, serializerClass);
  	}
docs: Adds a new Kryo default serializer to the Runtime.
  
  @param type
  The class of the types serialized with the given serializer.
  @param serializerClass
  The class of the serializer to use.