code: func (e *Enqueuer) EnqueueUniqueIn(jobName string, secondsFromNow int64, args map[string]interface{}) (*ScheduledJob, error) {
  	return e.EnqueueUniqueInByKey(jobName, secondsFromNow, args, nil)
  }
docs: // EnqueueUniqueIn enqueues a unique job in the scheduled job queue for execution in secondsFromNow seconds. See EnqueueUnique for the semantics of unique jobs.