Method GetLeastFrequentlyUsed

library/cpp/cache/cache.h:247–251

    }

    TItem* GetLeastFrequentlyUsed() {
        typename TListType::TIterator it = List.Begin();
        Y_ASSERT(it != List.End());
        return &*it;
    }

    void Erase(TItem* item) {
        item->Unlink();