gtk/print.go
func (ps *PrintSettings) SetNumberUpLayout(numberUpLayout NumberUpLayout) {
	C.gtk_print_settings_set_number_up_layout(ps.native(), C.GtkNumberUpLayout(numberUpLayout))
}
func (ps *PrintSettings) SetNumberUpLayout(numberUpLayout NumberUpLayout) {
	C.gtk_print_settings_set_number_up_layout(ps.native(), C.GtkNumberUpLayout(numberUpLayout))
}
// SetNumberUpLayout() is a wrapper around gtk_print_settings_set_number_up_layout().