class_docstr: Interface defining information available at process time
class_docstr_tok: ["Interface","defining","information","available","at","process","time"]
docstr: Returns ordering key of the input message, if one exists
docstr_tok: ["Returns","ordering","key","of","the","input","message",",","if","one","exists"]
code: def get_ordering_key(self):
      """Returns ordering key of the input message, if one exists"""
      pass
  
imports: from abc import abstractmethod
label_desc: Use image node_id 17 for calling the Context obj's underlying member method code with example usage: obj.get_ordering_key() without return types