Laravel - Queues - Chains Within Batches

You may define a set of chained jobs within a batch by placing the chained jobs within an array. For example, we may execute two job chains in parallel and execute a callback when both job chains have finished processing:

    use App\Jobs\ReleasePodcast;
    use App\Jobs\SendPodcastReleaseNotification;
    use Illuminate\Bus\Batch;
    use Illuminate\Support\Facades\Bus;
            new ReleasePodcast(1),
            new SendPodcastReleaseNotification(1),
            new ReleasePodcast(2),
            new SendPodcastReleaseNotification(2),
    ])->then(function (Batch $batch) {
        // ...