code: def ack(self, tup):
          
          tup_id = tup.id if isinstance(tup, Tuple) else tup
          self.send_message({"command": "ack", "id": tup_id})
docs: Indicate that processing of a Tuple has succeeded.
  
          :param tup: the Tuple to acknowledge.
          :type tup: :class:`str` or :class:`pystorm.component.Tuple`