code: def schedule_facebook_message(message, sender=None, priority=None):
      
      schedule_messages(message, recipients('fb', ''), sender=sender, priority=priority)
docs: Schedules Facebook wall message for delivery.
  
      :param str message: text or URL to publish.
      :param User sender: User model heir instance
      :param int priority: number describing message priority. If set overrides priority provided with message type.