class ActiveJob::QueueAdapters::SidekiqAdapter

def enqueue_at(job, timestamp) # :nodoc:
  job.provider_job_id = Sidekiq::Client.push \
    "class"   => JobWrapper,
    "wrapped" => job.class,
    "queue"   => job.queue_name,
    "args"    => [ job.serialize ],
    "at"      => timestamp
end