code: func (v *Frame) GetLabelWidget() (*Widget, error) {
  	c := C.gtk_frame_get_label_widget(v.native())
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	obj := glib.Take(unsafe.Pointer(c))
  	return wrapWidget(obj), nil
  }
docs: // GetLabelWidget is a wrapper around gtk_frame_get_label_widget().