// PackKeyWidget packs a key widget to the page with its getValue call
//
// (was _pack_subwidget).
func (build *builder) PackKeyWidget(key *cftype.Key, getValue func() interface{}, setValue func(interface{}), childs ...gtk.IWidget) {
for _, w := range childs {
build.pWidgetBox.PackStart(w, key.IsAlignedVertical, key.IsAlignedVertical, 0)
}
// key.SetValue = setValue
key.SetWidSetValue(setValue)
key.SetWidGetValue(getValue)
}