code: public synchronized ComponentMetricStore getJobMetricStore(String jobID) {
  		return jobID == null ? null : ComponentMetricStore.unmodifiable(jobs.get(jobID));
  	}
docs: Returns the {@link ComponentMetricStore} for the given job ID.
  
  @param jobID job ID
  @return ComponentMetricStore for the given ID, or null if no store for the given argument exists