/**
  * Convenience function for changing the state of a job identified by a given jobId
  *
  * @param  $jobId
  * @param  $state
  * @return JobInfo
  */
 public function updateJobState($jobId, $state)
 {
     $job = new JobInfo();
     $job->setId($jobId);
     $job->setState($state);
     return $this->updateJob($job);
 }