@Override
public void onResume() {
super.onResume();
eventBus.register(this);
Optional<Chat> chat = userProfile.getChat(chatId);
if (chat.isPresent() && !chat.get().messages.isEmpty()) {
setData(chat.get());
}
}
@Override
public void onPause() {
super.onPause();
eventBus.unregister(this);
}