return Iterator(list);
return ConstIterator(list);
MatchSet::Find(const Match& aMatch){    if (mMatches) {        List* list = NS_STATIC_CAST(List*, PL_HashTableLookup(mMatches, &aMatch));        if (list)            return Iterator(list);    }    else {        Iterator last = Last();        for (Iterator i = First(); i != last; ++i) {            if (*i == aMatch)                return i;        }    }    return Last();}