gtk/application_window.go
func (v *ApplicationWindow) SetShowMenubar(b bool) {
	C.gtk_application_window_set_show_menubar(v.native(), gbool(b))
}
func (v *ApplicationWindow) SetShowMenubar(b bool) {
	C.gtk_application_window_set_show_menubar(v.native(), gbool(b))
}
// SetShowMenubar is a wrapper around gtk_application_window_set_show_menubar().