+ * @brief Set a root of the Scene
+ *
+ * @param layer The root layer
+ */
+ void SetRoot(SceneGraph::Layer* layer)
+ {
+ mRoot = layer;
+ }
+
+ /**
+ * @brief Get a root of the Scene
+ *
+ * @return The root layer
+ */
+ SceneGraph::Layer* GetRoot() const
+ {
+ return mRoot;
+ }
+
+ /**