);
                        self.state.data.send_queue.extend(
                            mailbox
                                .drain(..)
                                .map(|message| stanzas::make_chat_message(message.1, message.0)),

                        self.state.data.counter += 1;
                        let id_ask_subscribe =
                            format!("id_ask_subscribe{}", self.state.data.counter);

                            .extend(mailbox.iter().map(|message| {
                                stanzas::make_chat_message(message.1.clone(), message.0.clone())
                            }));

                            .push_back(stanzas::make_ask_subscribe(
                                id_ask_subscribe,
                                xmpp_to.clone().into(),
                            ));