gtk/print.go
func (ps *PaperSize) native() *C.GtkPaperSize {
	if ps == nil {
		return nil
	}
	return ps.GtkPaperSize
}
func (ps *PaperSize) native() *C.GtkPaperSize {
	if ps == nil {
		return nil
	}
	return ps.GtkPaperSize
}
// native returns a pointer to the underlying GtkPaperSize.