Method PickOut

library/cpp/cache/cache.h:558–568

note: it shouldn't touch 'value' if it returns false.

    // note: it shouldn't touch 'value' if it returns false.
    bool PickOut(const TKey& key, TValue* value) {
        Y_ASSERT(value);
        TIndexIterator it = Index.find(key);
        if (it == Index.end())
            return false;
        *value = std::move(it->Value);
        List.Erase(const_cast<TItem*>(&*it));
        Index.erase(it);
        Y_ASSERT(Index.size() == List.GetSize());
        return true;
    }

    bool Insert(const std::pair<TKey, TValue>& p) {
        return Insert(p.first, p.second);