docs: def schedule_jabber_message(message, to, sender=None, priority=None):
      """Schedules Jabber XMPP message for delivery.
  
      :param str message: text to send.
      :param list|str|unicode to: recipients addresses or Django User model heir instances with `email` attributes.
      :param User sender: User model heir instance
      :param int priority: number describing message priority. If set overrides priority provided with message type.
      """
      schedule_messages(message, recipients('xmppsleek', to), sender=sender, priority=priority)