class_docstr: Interface defining information available at process time
class_docstr_tok: ["Interface","defining","information","available","at","process","time"]
docstr: Returns partition key of the input message is one exists
docstr_tok: ["Returns","partition","key","of","the","input","message","is","one","exists"]
code: def get_partition_key(self):
      """Returns partition key of the input message is one exists"""
      pass
  
imports: from abc import abstractmethod
label_desc: Use image node_id 16 for calling the Context obj's underlying member method code with example usage: obj.get_partition_key() without return types