void OnDestroy()
 {
     if (instance == this)
     {
         instance = null;
     }
 }
    private void Awake()
    {
        if (instance == null)
        {
            instance = this;
        }
        else if (instance != this)
        {
            Destroy(gameObject);
        }

        markupDict = new Dictionary <string, MarkUpRecord>();
    }