gtk/print.go
func (ps *PrintSettings) SetNCopies(copies int) {
	C.gtk_print_settings_set_n_copies(ps.native(), C.gint(copies))
}
func (ps *PrintSettings) SetNCopies(copies int) {
	C.gtk_print_settings_set_n_copies(ps.native(), C.gint(copies))
}
// SetNCopies() is a wrapper around gtk_print_settings_set_n_copies().