class_docstr: Interface defining information available at process time
class_docstr_tok: ["Interface","defining","information","available","at","process","time"]
docstr: Return the key of the current message that we are processing
docstr_tok: ["Return","the","key","of","the","current","message","that","we","are","processing"]
code: def get_message_key(self):
      """Return the key of the current message that we are processing"""
      pass
  
imports: from abc import abstractmethod
label_desc: Use image node_id 2 for calling the Context obj's underlying member method code with example usage: obj.get_message_key() without return types