Switching from MutateJobService to BulkJobService

Hi,

I am trying to change the old 'MutateJobService' to 'BulkJobService' as the former service has been deprecated in the last version of the API. 

I use PHP, and my code currently looks like this:

    public function create_mutate_job($client_id, $operations) {

        $user = new AdWordsUser();

        $user->SetClientCustomerId($client_id);

        $mutateJobService = $user->GetService('MutateJobService ', ADWORDS_VERSION);

        $policy = new BulkMutateJobPolicy();

        $policy->prerequisiteJobIds = array();

        $job = $mutateJobService->mutate($operations, $policy);

        if (!empty($job->id)) {

            $job_details = new stdClass();

            $job_details->job_id = $job->id;

            $job_details->client_id = $client_id;

            return $job_details;

        }

    }

I tried to change the service name to 'BatchJobService', however that doesn't work (just fails silently). There is an 'uploadurl' property which needs to be used and that is where I need a help. 

How could I change the code above so it works with 'BatchJobService'?

Cheers,

Kanan

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