the only low level language i've really worked with often is rust so

std::vector<uint8_t> Messenger::executeRemoteMethodSync(const std::string object, const std::string method, ArgsConstructor argsConstructor) {
    std::promise<std::vector<uint8_t>> promise;
    std::future<std::vector<uint8_t>> future = promise.get_future();
    executeRemoteMethod(object, method, argsConstructor, [&promise](const std::vector<uint8_t> data) {
        promise.set_value(data);
    });
    return future.get();
}

std::vector<uint8_t> Messenger::executeRemoteMethodSync(const std::string object, const std::string method, ArgsConstructor argsConstructor) {
    std::promise<std::vector<uint8_t>> promise;
    std::future<std::vector<uint8_t>> future = promise.get_future();
    executeRemoteMethod(object, method, argsConstructor, [&promise](const std::vector<uint8_t> data) {
        promise.set_value(data);
    });
    return future.get();
}