I think this can be closed. I checked all Gtk function calls and found them all with a search on the GNOME developer center page. I think this functions are confusing maybe: ``` gtk_tree_store_iter_clear_nodes _gtk_cell_layout_get_cells ``` These will not be found in the Gtk API because they are part of ```treebrowser.c```. IMHO there are no references to Gtk internals but some bad naming. Or did I oversee something?