gtk/print.go
func (ps *PrintSettings) GetNmberUp() int {
	c := C.gtk_print_settings_get_number_up(ps.native())
	return int(c)
}
func (ps *PrintSettings) GetNmberUp() int {
	c := C.gtk_print_settings_get_number_up(ps.native())
	return int(c)
}
// GetNmberUp() is a wrapper around gtk_print_settings_get_number_up().