code: def schedule_vkontakte_message(message, to, sender=None, priority=None):
      
      schedule_messages(message, recipients('vk', to), sender=sender, priority=priority)
docs: Schedules VKontakte message for delivery.
  
      :param str message: text or URL to publish on wall.
      :param list|str|unicode to: recipients addresses or Django User model heir instances with `vk` attributes.
      :param User sender: User model heir instance
      :param int priority: number describing message priority. If set overrides priority provided with message type.