public void AcceptChanges_Should_AcceptChanges_On_Collection_Property()
{
var order = Helper.GetOrder();
var trackable = order.AsTrackable();
trackable.OrderDetails[0].ItemNo = "ItemTesting";
var intf = trackable.CastToIChangeTrackable();
intf.AcceptChanges();
trackable.OrderDetails[0].ItemNo.Should().Be("ItemTesting");
trackable.OrderDetails[0].CastToIChangeTrackable().GetOriginalValue(i => i.ItemNo).Should().Be("ItemTesting");
}