Creates a new gtk.MenuBar and populates it with menu items
and submenus according to model.
The created menu items are connected to actions found in the
gtk.ApplicationWindow to which the menu bar belongs - typically
by means of being contained within the gtk.ApplicationWindows
widget hierarchy.
Creates a new gtk.MenuBar and populates it with menu items and submenus according to model.
The created menu items are connected to actions found in the gtk.ApplicationWindow to which the menu bar belongs - typically by means of being contained within the gtk.ApplicationWindows widget hierarchy.