Method RemoveIfOverflown

library/cpp/cache/cache.h:387–396

    }

    TItem* RemoveIfOverflown() {
        if (Size <= MaxSize) {
            return nullptr;
        }

        auto lightest = GetLightest();
        Erase(lightest);
        PopHeap(Heap.begin(), Heap.end(), THeapComparator());
        return lightest;
    }

    TItem* GetLightest() {
        FixHeap();