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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def GetBatchJobHelper(self, version=sorted(_SERVICE_MAP.keys())[-1], server=None):
 """Returns a BatchJobHelper to work with the BatchJobService. This is a convenience method. It is functionally identical to calling BatchJobHelper(adwords_client, version). Args: [optional] version: A string identifying the AdWords version to connect to. This defaults to what is currently the latest version. This will be updated in future releases to point to what is then the latest version. server: A string identifying the webserver hosting the AdWords API. Returns: An initialized BatchJobHelper tied to this client. """

    if not server:
      server = _DEFAULT_ENDPOINT

    request_builder = BatchJobHelper.GetRequestBuilder(
        self, version=version, server=server)
    response_parser = BatchJobHelper.GetResponseParser()

    return BatchJobHelper(request_builder, response_parser)