code: private Trigger createTrigger(JobKey jobKey, JobSpec jobSpec) {
      // Build a trigger for the job with the given cron-style schedule
      return TriggerBuilder.newTrigger()
          .withIdentity("Cron for " + jobSpec.getUri())
          .forJob(jobKey)
          .withSchedule(CronScheduleBuilder.cronSchedule(
                           jobSpec.getConfig().getString(ConfigurationKeys.JOB_SCHEDULE_KEY)))
          .build();
    }
docs: Create a {@link Trigger} from the given {@link JobSpec}