diff --git a/demos/gtk-demo/tree_store.c b/demos/gtk-demo/tree_store.c
index 52b6034..86683e9 100644
--- a/demos/gtk-demo/tree_store.c
+++ b/demos/gtk-demo/tree_store.c
@@ -25,6 +25,11 @@
 /*  It provides a way to specify how temporary widgets should be configured for editing, get the new value, etc.                        */
 /*  _   _   _   _   _   _   _   _   _   _   _   _   _   _                       _   _   _   _   _   _   _   _   _   _   _   _   _   _   */
 /*  _   _   _   _   _   _   _   _   _   _   _   _   _   _      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                                                                                  */
+/*                                                                                                                                      */
 /*                                                                                                                                      */
 /*  https://developer-old.gnome.org/gtk4/stable/GtkTreeView.html                                                                        */
 /*  https://en.wikibooks.org/wiki/GTK%2B_By_Example/Tree_View/Custom_Models                                                             */
@@ -38,6 +43,33 @@
 /****************************************************************************************************************************************/
 
 
+
+/*  ... Finally here’s a quick comparison chart of equivalent functionalitqy
+                 to look for when transitioning code:
+
+                   Old 	                 New
+      ..................................................................
+                GtkTreeModel 	      GListModel
+                GtkTreePath 	      guint position, GtkTreeListRow
+                GtkTreeIter 	      guint position
+                GtkTreeRowReference   GObject item
+                GtkListStore 	      GListStore
+                GtkTreeStore 	      GtkTreeListModel, GtkTreeExpander
+                GtkTreeSelection      GtkSelectionModel
+                GtkTreeViewColumn     GtkColumnView
+                GtkTreeView 	      GtkListView, GtkColumnView
+                GtkCellView 	      GtkListItem
+                GtkComboBox 	      GtkDropDown
+                GtkIconView 	      GtkGridView
+                GtkTreeSortable       GtkColumnView
+                GtkTreeModelSort      GtkSortListModel
+                GtkTreeModelFilter    GtkFilterListModel
+                GtkCellLayout         GtkListItemFactory
+                GtkCellArea           GtkWidget
+                GtkCellRenderer       GtkWidget
+..............................................................................*/
+
+
 #include <gtk/gtk.h>
 #include <stdio.h>
 #include "config.h"