code: public void pauseJobs (final GroupMatcher <JobKey> groupMatcher) throws SchedulerException
    {
      validateState ();
  
      final ICommonsCollection <String> pausedGroups = m_aResources.getJobStore ()
                                                                   .pauseJobs (_getOrDefault (groupMatcher));
      notifySchedulerThread (0L);
      for (final String pausedGroup : pausedGroups)
      {
        notifySchedulerListenersPausedJobs (pausedGroup);
      }
    }
docs: <p>
  Pause all of the <code>{@link com.helger.quartz.IJobDetail}s</code> in the
  matching groups - by pausing all of their <code>Trigger</code>s.
  </p>