public override void OnEnable()
        {
            base.OnEnable();
            _reference = (SceneVariable)target;

            if (_reference == null)
            {
                return;
            }

            advanceOption = serializedObject.FindProperty("advanceOption");
            isEnabled     = serializedObject.FindProperty("isEnabled");
            scenePath     = serializedObject.FindProperty("scenePath");
            sceneName     = serializedObject.FindProperty("sceneName");
            animationSpeedForLoadingBar = serializedObject.FindProperty("animationSpeedForLoadingBar");
            loadSceneMode = serializedObject.FindProperty("loadSceneMode");

            ClampAnimationValue();
        }