Method erase_first

src/game/recomp_data_api.cpp:141–152

    }
    
    bool erase_first(ValueType& out) {
        std::lock_guard lock{mutex};
        auto it = map.items().begin();

        if (it == map.items().end()) {
            return false;
        }

        out = it->second;
        map.erase(it->first);
        return true;
    }

    size_t size() {
        std::lock_guard lock{mutex};