class_docstr: Interface defining information available at process time
class_docstr_tok: ["Interface","defining","information","available","at","process","time"]
docstr: ack this message id
docstr_tok: ["ack","this","message","id"]
code: def ack(self, msgid, topic):
      """ack this message id"""
      pass
  
imports: from abc import abstractmethod
label_desc: Use image node_id 23 for calling the Context obj's underlying member method code with example usage: obj.ack(msgid, topic) without return types