void CallBack(string callbackType){    if (tweenArguments.Contains(callbackType) && !tweenArguments.Contains("ischild")) {        //establish target:        GameObject target;        if (tweenArguments.Contains(callbackType+"target")) {            target=(GameObject)tweenArguments[callbackType+"target"];        }else{            target=gameObject;            }                //throw an error if a string wasn‘t passed for callback:        if (tweenArguments[callbackType].GetType() == typeof(System.String)) {            target.SendMessage((string)tweenArguments[callbackType],(object)tweenArguments[callbackType+"params"],SendMessageOptions.DontRequireReceiver);        }else if (tweenArguments[callbackType] is Action) {            ((Action)tweenArguments[callbackType]).Invoke();        }else if (tweenArguments[callbackType] is Action<object>) {            ((Action<object>)tweenArguments[callbackType]).Invoke((object)tweenArguments[callbackType + "params"]);        }else{            Debug.LogError("iTween Error: Callback method references must be passed as a String!");            Destroy (this);        }    }}

iTween.MoveTo(gameObject, iTween.Hash(    "x", x,    "y", y,    "time", t,    "easeType", iTween.EaseType.easeInCubic,     "onComplete", (Action)Landing));    void Landing() {    // TODO}