gtk/gtk.go
func (v *Notebook) GetActionWidget(packType PackType) (*Widget, error) {
	c := C.gtk_notebook_get_action_widget(v.native(),
		C.GtkPackType(packType))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapWidget(glib.Take(unsafe.Pointer(c))), nil
}
func (v *Notebook) GetActionWidget(packType PackType) (*Widget, error) {
	c := C.gtk_notebook_get_action_widget(v.native(),
		C.GtkPackType(packType))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapWidget(glib.Take(unsafe.Pointer(c))), nil
}
// GetActionWidget() is a wrapper around gtk_notebook_get_action_widget().