enqueue_at

# File activejob/lib/active_job/queue_adapters/sidekiq_adapter.rb, line 27
        def enqueue_at(job, timestamp) #:nodoc:
          Sidekiq::Client.push              'class' => JobWrapper,
            'queue' => job.queue_name,
            'args'  => [ job.serialize ],
            'at'    => timestamp
        end