Creates a GtkMenu and populates it with menu items and
submenus according to model.
The created menu items are connected to actions found in the
GtkApplicationWindow to which the menu belongs - typically
by means of being attached to a widget (see gtk_menu_attach_to_widget())
that is contained within the GtkApplicationWindows widget hierarchy.
Creates a GtkMenu and populates it with menu items and submenus according to model. The created menu items are connected to actions found in the GtkApplicationWindow to which the menu belongs - typically by means of being attached to a widget (see gtk_menu_attach_to_widget()) that is contained within the GtkApplicationWindows widget hierarchy.