code: @Override public void unscheduleJob(URI jobSpecURI) {
      JobSpecSchedule existingSchedule = null;
      synchronized (this) {
        existingSchedule = _schedules.get(jobSpecURI);
        if (null != existingSchedule) {
          _log.info("Unscheduling " + existingSchedule);
          this._schedules.remove(jobSpecURI);
          doUnschedule(existingSchedule);
        }
      }
      if (null != existingSchedule) {
        _callbacksDispatcher.onJobUnscheduled(existingSchedule);
      }
    }
docs: {@inheritDoc}