public Action AddKeyPressListener(object callback)    {        var cb = ReactUnity.Helpers.Callback.From(callback);        Action<string> listener = null;        listener = (val) => {            if (cb?.callback == null) // Check if we lost reference to cb, if so unsubscribe because we probably lost handle.            {               OnKeyPress  -= listener;               return;            }            cb.Call(val);        }        OnKeyPress += listener;        return () => OnKeyPress -= listener;    }

  const [key, setKey] = useState("");  useEffect(() => {        const unsubscribe = Global.Instance.AddKeyPressListener((input: string) => {      setKey(input);    });    // Get current value before hook is called    const input= Global.Instance.LastKeyPressed;    setKey(input);    return () => unsubscribe();  }, []);