void unsubscribe(proton::sender lnk) {
std::string address = lnk.local_source().address();
if (queues_.get(address).unsubscribe(lnk)) {
queues_.erase(address);
}
}
void on_sender_open(proton::sender &sender) override {
if (sender.remote_source().dynamic()) {
sender.local_source().address(generate_address());
senders[sender.local_source().address()] = sender;
}
}