Rename it accordingly.
{
        WriteBufferFromFile json_out(filename);
        std::lock_guard lock(mutex);
        auto print_key_value = [&](auto key, auto value, bool with_comma = true)
        {
            json_out << double_quote << key << ": " << value << (with_comma ? ",\n" : "\n");
        };
        auto print_percentile = [&json_out](Stats & info, auto percent, bool with_comma = true)
        {
            json_out << "\"" << percent << "\": " << info.sampler.quantileNearest(percent / 100.0) << (with_comma ? ",\n" : "\n");
        };
        json_out << "{\n";
        for (size_t i = 0; i < infos.size(); ++i)