class ActiveJob::QueueAdapters::QueueClassicAdapter

def enqueue_at(job, timestamp) #:nodoc:
  queue = build_queue(job.queue_name)
  unless queue.respond_to?(:enqueue_at)
    raise NotImplementedError, 'To be able to schedule jobs with Queue Classic ' \
      'the QC::Queue needs to respond to `enqueue_at(timestamp, method, *args)`. '
      'You can implement this yourself or you can use the queue_classic-later gem.'
  end
  queue.enqueue_at(timestamp, "#{JobWrapper.name}.perform", job.serialize)
end