[anykey]

можно так, наверное:

void isConRecUnique(Args _args)
{
   Container    myCon;
   Set          mySet = new set(Types::String);
   Int          elementsNum;
   ;
   //... fill in container
   elementsNum = conlen(mycon);
   info(elementsNum == set::create( [ 1, any2int(mySet.typeId()), elementsNum ] + myCon ).elements() ?
        "Unique" : "Not unique") ;
}