Convenience function for prepending a submenu menu item to the start of @menu. Combine g_menu_item_new_submenu() and g_menu_insert_item() for a more flexible alternative.
the section label, or %NULL
a #GMenuModel with the items of the submenu
2.32
See Implementation
Convenience function for prepending a submenu menu item to the start of @menu. Combine g_menu_item_new_submenu() and g_menu_insert_item() for a more flexible alternative.