unsigned long long closureSize = 0, size = 0;

    uint64_t closureSize = 0, size = 0;

template<> void toJSON<std::atomic<unsigned long>>(std::ostream & str, const std::atomic<unsigned long> & n) { str << n; }
template<> void toJSON<std::atomic<unsigned long long>>(std::ostream & str, const std::atomic<unsigned long long> & n) { str << n; }

template<> void toJSON<std::atomic<uint64_t>>(std::ostream & str, const std::atomic<uint64_t> & n) { str << n; }

    std::optional<unsigned long long> expectedSize;

    std::optional<uint64_t> expectedSize;

    std::optional<unsigned long long> fileSize;

    std::optional<uint64_t> fileSize;

        res.closureSize = r[0][3].is_null() ? 0 : r[0][3].as<unsigned long long>();
        res.size = r[0][4].is_null() ? 0 : r[0][4].as<unsigned long long>();

        res.closureSize = r[0][3].is_null() ? 0 : r[0][3].as<uint64_t>();
        res.size = r[0][4].is_null() ? 0 : r[0][4].as<uint64_t>();