Returns the parition context in the following format:
        "PartitionContext({EventHubPath}{ConsumerGroupName}{PartitionId}{SequenceNumber})"

        :rtype: str

def to_string(self):
        """
        Returns the parition context in the following format:
        "PartitionContext({EventHubPath}{ConsumerGroupName}{PartitionId}{SequenceNumber})"

        :rtype: str
        """
        return "PartitionContext({}{}{}{})".format(self.eh_path,
                                                   self.consumer_group_name,
                                                   self.partition_id,
                                                   self.sequence_number)