diff --git a/demos/gtk-demo/tree_store.c b/demos/gtk-demo/tree_store.c
index 2a1e65f..2e5baba 100644
--- a/demos/gtk-demo/tree_store.c
+++ b/demos/gtk-demo/tree_store.c
@@ -26,7 +26,6 @@
 /*  _   _   _   _   _   _   _   _   _   _   _   _   _   _                       _   _   _   _   _   _   _   _   _   _   _   _   _   _   */
 /*  _   _   _   _   _   _   _   _   _   _   _   _   _   _      T R E E          _   _   _   _   _   _   _   _   _   _   _   _   _   _   */
 /*  https://docs.gtk.org/gtk4/                                                                                                          */
-/*  https://docs.gtk.org/gtk4/section-tree-widget.html                                                                                  */
 /*  https://docs.gtk.org/gtk4/section-list-widget.html   <<  (see below the "quick comparison chart of equivalent functionalities")     */
 /*  https://docs.gtk.org/gtk4/class.TreeListModel.html                                                                                  */
 /*                                                                                                                                      */
@@ -319,6 +318,15 @@ do_tree_store (GtkWidget *do_widget)
       GtkTreeStore *my_tree_store = NULL; /////
       GtkTreeListModel *my_tree_list_model;
 
+      char *my_str_data = "A";
+      GListStore *my_g_list_store = g_list_store_new (my_str_data);
+      g_list_store_append (my_g_list_store, "C");
+      g_list_store_insert (my_g_list_store, "B", 1);
+      printf("Item : 'C' find in my_g_list_store at position 2 = %d\n",\
+             g_list_store_find (my_g_list_store, "C", 2));
+      g_list_store_remove (my_g_list_store, 0);
+      g_list_store_remove_all (my_g_list_store);
+
       /* create window, etc */
       my_window = gtk_window_new ();
       gtk_window_set_title (GTK_WINDOW (my_window), "Tree Store");