protected virtual Option <IMenuModel> CreateItem(object item, Option <IMenuModel> parent)
{
Ensure.That(item, nameof(item)).IsNotNull();
var label = Optional(item)
.Bind(c => Renderers.Find(r => r.CanRender(c)).Map(r => r.Render(c)))
.HeadOrNone();
return(label.Map <IMenuModel>(v => new MenuModel(v.Key, v.DisplayName, item, parent)));
}
