nhibernate detachedcriteria.setfirstresult?

i found an instance implementing repository settlement nhibernate web, methods uses formula initial outcome query:

public ienumerable<t> findall(detachedcriteria criteria, int firstresult, int numberofresults, params order[] orders)

{
    criteria.setfirstresult(firstresult).setmaxresults(numberofresults);
    relapse findall(criteria, orders);
}

but vs intellisense isn't picking adult slight detachedcriteria. does anyone know illusory detachedcriteria? i'm controlling nhibernate chronicle 1.2.1.