private Func <Order, bool> WhenDeleteAdultOrder()
{
Func <Order, bool> modelDeletePredicate = null;
_model.When(m => m.Delete(Arg.Any <Func <Order, bool> >()))
.Do(m => modelDeletePredicate = m[0] as Func <Order, bool>);
_orderController.DeleteAdultOrders();
return(modelDeletePredicate);
}