LevelFrame2.java

    @Override
    public void attachTriggerHandler(TriggerType type, TriggerHandler handler) {
        if (type == TriggerType.NEXT)
            gameFrame.attachTriggerHandler(type, handler);

        eventController.addTriggerHandler(type, handler);
    }

    @Override
    public void removeTriggerHandler(TriggerType type, TriggerHandler handler) {
        if (type == TriggerType.NEXT)
            gameFrame.removeTriggerHandler(type, handler);

        eventController.removeTriggerHandler(type, handler);
    }