public final PairChat openChat(final XmppURI uri) {
PairChat chat = getChat(uri);
if (chat == null) {
chat = new PairChat(this, eventBus, session, uri, session.getCurrentUserURI());
chats.add(chat);
eventBus.fireEventFromSource(new PairChatChangedEvent(ChangeType.created, chat), this);
}
chat.open();
return chat;
}