gtk/print.go
func (ps *PrintSettings) GetDuplex() PrintDuplex {
	c := C.gtk_print_settings_get_duplex(ps.native())
	return PrintDuplex(c)
}
func (ps *PrintSettings) GetDuplex() PrintDuplex {
	c := C.gtk_print_settings_get_duplex(ps.native())
	return PrintDuplex(c)
}
// GetDuplex() is a wrapper around gtk_print_settings_get_duplex().