Method Attach

library/cpp/par/par_remote.h:229–234

            Y_ASSERT(Callback.Get() == nullptr);
        }
        void Attach(T* obj, TRemoteQueryProcessor* queryProc, const TGUID& reqId) {
            if (reqId.IsEmpty() || queryProc == nullptr)
                return;
            Callback = new TCallback(obj);
            queryProc->RegisterCallback(reqId, Callback.Get());
        }
        void Detach() {
            if (Callback.Get() == nullptr)
                return;