Eagerly load two or more collections

I'll be verbose on it:

this link has exactly what i needed for.

As a proof of concept I wrote this unit test to check that collections are loaded eagerly. Domain model is a client has a collection of prders. An Order has a collection of bills

Client client = null;
using (new NHibernateSession())
{
 ISession session = NHibernateSession.GetISession(typeof(Client));
  
 client = session.CreateCriteria(typeof(Client))
  .SetFetchMode("Orders", FetchMode.Join)
  .UniqueResult();
    
 session.CreateCriteria(typeof(Client))
  .CreateCriteria("Orders")
  .SetFetchMode("Bills", FetchMode.Join)
  .List();
}
   
// Assert that orders and order.Bills are eagerly laoded
foreach (RisingStar.BLL.Model.Order order in client.Orders)
{
 order.Bills.Count.ToString()
}