Sets or unsets the "submenu" link of @menu_item to @submenu.
If @submenu is non-%NULL, it is linked to. If it is %NULL then the link is unset.
The effect of having one menu appear as a submenu of another is exactly as it sounds.
a #GMenuModel, or %NULL
2.32
See Implementation
Sets or unsets the "submenu" link of @menu_item to @submenu.
If @submenu is non-%NULL, it is linked to. If it is %NULL then the link is unset.
The effect of having one menu appear as a submenu of another is exactly as it sounds.