gtk/gtk.go
func (v *Notebook) GetMenuLabel(child IWidget) (*Widget, error) {
	c := C.gtk_notebook_get_menu_label(v.native(), child.toWidget())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapWidget(glib.Take(unsafe.Pointer(c))), nil
}
func (v *Notebook) GetMenuLabel(child IWidget) (*Widget, error) {
	c := C.gtk_notebook_get_menu_label(v.native(), child.toWidget())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapWidget(glib.Take(unsafe.Pointer(c))), nil
}
// GetMenuLabel() is a wrapper around gtk_notebook_get_menu_label().