code: def send_tracked(self, stanza, tracker):
          
          token = self.client.enqueue(stanza)
          self.attach_tracker(stanza, tracker, token)
          return token
docs: Send a message stanza with tracking.
  
          :param stanza: Message stanza to send.
          :type stanza: :class:`aioxmpp.Message`
          :param tracker: Message tracker to use.
          :type tracker: :class:`~.MessageTracker`
          :rtype: :class:`~.StanzaToken`
          :return: The token used to send the stanza.
  
          If `tracker` is :data:`None`, a new :class:`~.MessageTracker` is
          created.
  
          This configures tracking for the stanza as if by calling
          :meth:`attach_tracker` with a `token` and sends the stanza through the
          stream.
  
          .. seealso::
  
             :meth:`attach_tracker`
                can be used if the stanza cannot be sent (e.g. because it is a
                carbon-copy) or has already been sent.