Inheritance: UnityEngine.MonoBehaviour
        public void Load(LevelDef def)
        {
            if (IsLoaded)
            {
                Debug.LogError("trying to load again.");
                return;
            }

            _levelDef = def;
            _map = MapGenerator.Generate(def);
            _starsLeft = new HashSet<Star>(_map.Stars);
            Star.OnGetStar += OnGetStar;
            _getStarRegistered = true;

            _ball = MapFactory.InstantiateBall(_map.StartPoisition);
            _ball.transform.SetParent(transform, false);
            var ballController = _ball.gameObject.AddComponent<BallController>();
            ballController.Ball = _ball;
        }