gtk/gtk_since_3_20.go
func FileChooserNativeDialogNew(
	title string,
	parent *Window,
	action FileChooserAction,
	accept_label string,
	cancel_label string) (*FileChooserNativeDialog, error) {
	c_title := C.CString(title)
	defer C.free(unsafe.Pointer(c_title))
	c_accept_label := C.CString(accept_label)
	defer C.free(unsafe.Pointer(c_accept_label))
	c_cancel_label := C.CString(cancel_label)
	defer C.free(unsafe.Pointer(c_cancel_label))
	c := C.gtk_file_chooser_native_new(
		(*C.gchar)(c_title), parent.native(), C.GtkFileChooserAction(action),
		(*C.gchar)(c_accept_label), (*C.gchar)(c_cancel_label))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserNativeDialog(obj), nil
}
func FileChooserNativeDialogNew(
	title string,
	parent *Window,
	action FileChooserAction,
	accept_label string,
	cancel_label string) (*FileChooserNativeDialog, error) {
	c_title := C.CString(title)
	defer C.free(unsafe.Pointer(c_title))
	c_accept_label := C.CString(accept_label)
	defer C.free(unsafe.Pointer(c_accept_label))
	c_cancel_label := C.CString(cancel_label)
	defer C.free(unsafe.Pointer(c_cancel_label))
	c := C.gtk_file_chooser_native_new(
		(*C.gchar)(c_title), parent.native(), C.GtkFileChooserAction(action),
		(*C.gchar)(c_accept_label), (*C.gchar)(c_cancel_label))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserNativeDialog(obj), nil
}
// FileChooserNativeDialogNew is a wrapper around gtk_file_chooser_native_new().