Method Callback

net/TcpClient.cpp:209–211

   public:
    Callback(td::actor::ActorId<TcpClientImpl> id, ListeningSocketId listening_socket_id)
        : id_(id), listening_socket_id_(listening_socket_id) {
    }
    void accept(td::SocketFd fd) override {
      td::actor::send_closure(id_, &TcpClientImpl::accepted_tcp_connection, td::BufferedFd<td::SocketFd>(std::move(fd)),
                              listening_socket_id_);