code: def getNumberOfJobsIssued(self, preemptable=None):
          
          if preemptable is None:
              return len(self.jobBatchSystemIDToIssuedJob)
          elif preemptable:
              return self.preemptableJobsIssued
          else:
              assert len(self.jobBatchSystemIDToIssuedJob) >= self.preemptableJobsIssued
              return len(self.jobBatchSystemIDToIssuedJob) - self.preemptableJobsIssued
docs: Gets number of jobs that have been added by issueJob(s) and not
          removed by removeJob
  
          :param None or boolean preemptable: If none, return all types of jobs.
            If true, return just the number of preemptable jobs. If false, return
            just the number of non-preemptable jobs.