Someone

void
StrigiDBusServer::receiveSet(DBusMessage* msg, DBusConnection* conn) {
    DBusMessageReader reader(msg);
    DBusMessageWriter writer(conn, msg);
    set<string> s;
    reader >> s;
    if (reader.isOk()) {
        impl->receiveSet(s);
    } else {
        string e("error");
        writer << e;
    }
}