code: def to_string(self):
          
          return "PartitionContext({}{}{}{})".format(self.eh_path,
                                                     self.consumer_group_name,
                                                     self.partition_id,
                                                     self.sequence_number)
docs: Returns the parition context in the following format:
          "PartitionContext({EventHubPath}{ConsumerGroupName}{PartitionId}{SequenceNumber})"
  
          :rtype: str