private static void Assert_level2_breadcrumb_values(Breadcrumb breadcrumb)
{
var l2Property = typeof(L1).GetProperty("L2Property");
breadcrumb.PathShouldBe("ROOT", "Level-1-Property");
breadcrumb.DisplayString.ShouldBe("Level-2");
breadcrumb.PropertiesShouldBe(l2Property);
breadcrumb.ItemTypesShouldBe<L1>();
Assert_level1_breadcrumb_values(breadcrumb.Parent);
}