<form method="POST">
    <h3>Editing: PendingChain.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

namespace Illuminate\Foundation\Bus;

use Closure;
use Illuminate\Contracts\Bus\Dispatcher;
use Illuminate\Queue\CallQueuedClosure;
use Illuminate\Queue\SerializableClosureFactory;

class PendingChain
{
    /**
     * The class name of the job being dispatched.
     *
     * @var mixed
     */
    public $job;

    /**
     * The jobs to be chained.
     *
     * @var array
     */
    public $chain;

    /**
     * The name of the connection the chain should be sent to.
     *
     * @var string|null
     */
    public $connection;

    /**
     * The name of the queue the chain should be sent to.
     *
     * @var string|null
     */
    public $queue;

    /**
     * The number of seconds before the chain should be made available.
     *
     * @var \DateTimeInterface|\DateInterval|int|null
     */
    public $delay;

    /**
     * The callbacks to be executed on failure.
     *
     * @var array
     */
    public $catchCallbacks = [];

    /**
     * Create a new PendingChain instance.
     *
     * @param  mixed  $job
     * @param  array  $chain
     * @return void
     */
    public function __construct($job, $chain)
    {
        $this-&gt;job = $job;
        $this-&gt;chain = $chain;
    }

    /**
     * Set the desired connection for the job.
     *
     * @param  string|null  $connection
     * @return $this
     */
    public function onConnection($connection)
    {
        $this-&gt;connection = $connection;

        return $this;
    }

    /**
     * Set the desired queue for the job.
     *
     * @param  string|null  $queue
     * @return $this
     */
    public function onQueue($queue)
    {
        $this-&gt;queue = $queue;

        return $this;
    }

    /**
     * Set the desired delay for the chain.
     *
     * @param  \DateTimeInterface|\DateInterval|int|null  $delay
     * @return $this
     */
    public function delay($delay)
    {
        $this-&gt;delay = $delay;

        return $this;
    }

    /**
     * Add a callback to be executed on job failure.
     *
     * @param  callable  $callback
     * @return $this
     */
    public function catch($callback)
    {
        $this-&gt;catchCallbacks[] = $callback instanceof Closure
                        ? SerializableClosureFactory::make($callback)
                        : $callback;

        return $this;
    }

    /**
     * Get the &quot;catch&quot; callbacks that have been registered.
     *
     * @return array
     */
    public function catchCallbacks()
    {
        return $this-&gt;catchCallbacks ?? [];
    }

    /**
     * Dispatch the job with the given arguments.
     *
     * @return \Illuminate\Foundation\Bus\PendingDispatch
     */
    public function dispatch()
    {
        if (is_string($this-&gt;job)) {
            $firstJob = new $this-&gt;job(...func_get_args());
        } elseif ($this-&gt;job instanceof Closure) {
            $firstJob = CallQueuedClosure::create($this-&gt;job);
        } else {
            $firstJob = $this-&gt;job;
        }

        if ($this-&gt;connection) {
            $firstJob-&gt;chainConnection = $this-&gt;connection;
            $firstJob-&gt;connection = $firstJob-&gt;connection ?: $this-&gt;connection;
        }

        if ($this-&gt;queue) {
            $firstJob-&gt;chainQueue = $this-&gt;queue;
            $firstJob-&gt;queue = $firstJob-&gt;queue ?: $this-&gt;queue;
        }

        if ($this-&gt;delay) {
            $firstJob-&gt;delay = ! is_null($firstJob-&gt;delay) ? $firstJob-&gt;delay : $this-&gt;delay;
        }

        $firstJob-&gt;chain($this-&gt;chain);
        $firstJob-&gt;chainCatchCallbacks = $this-&gt;catchCallbacks();

        return app(Dispatcher::class)-&gt;dispatch($firstJob);
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>