docs: public <T extends Serializer<?> & Serializable>void addDefaultKryoSerializer(Class<?> type, T serializer) {
  		if (type == null || serializer == null) {
  			throw new NullPointerException("Cannot register null class or serializer.");
  		}
  
  		defaultKryoSerializers.put(type, new SerializableSerializer<>(serializer));
  	}