+ /**
+ * @brief Register property notification to check highlighted object position
+ */
+ void RegisterPositionPropertyNotification();
+
+ /**
+ * @brief Remove property notification added by RegisterPropertyNotification
+ */
+ void UnregisterPositionPropertyNotification();
+
+ /**
+ * @brief Check if the actor is showing
+ * @return True if the actor is showing
+ */
+ bool IsShowing();
+