public void OnDisable()
 {
     if (instance == this)
     {
         instance = null;
     }
 }
        public static void CreateObject(INearbyConnectionClient client)
        {
            if (instance != null)
            {
                return;
            }

            mClient = client;
            if (Application.isPlaying)
            {
                // add an invisible game object to the scene
                GameObject obj = new GameObject("PlayGames_NearbyHelper");
                DontDestroyOnLoad(obj);
                instance = obj.AddComponent <NearbyHelperObject>();
            }
            else
            {
                instance = new NearbyHelperObject();
            }
        }