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

namespace Illuminate\Pipeline;

use Closure;
use Illuminate\Contracts\Container\Container;
use Illuminate\Contracts\Pipeline\Hub as HubContract;

class Hub implements HubContract
{
    /**
     * The container implementation.
     *
     * @var \Illuminate\Contracts\Container\Container|null
     */
    protected $container;

    /**
     * All of the available pipelines.
     *
     * @var array
     */
    protected $pipelines = [];

    /**
     * Create a new Hub instance.
     *
     * @param  \Illuminate\Contracts\Container\Container|null  $container
     * @return void
     */
    public function __construct(Container $container = null)
    {
        $this-&gt;container = $container;
    }

    /**
     * Define the default named pipeline.
     *
     * @param  \Closure  $callback
     * @return void
     */
    public function defaults(Closure $callback)
    {
        return $this-&gt;pipeline('default', $callback);
    }

    /**
     * Define a new named pipeline.
     *
     * @param  string  $name
     * @param  \Closure  $callback
     * @return void
     */
    public function pipeline($name, Closure $callback)
    {
        $this-&gt;pipelines[$name] = $callback;
    }

    /**
     * Send an object through one of the available pipelines.
     *
     * @param  mixed  $object
     * @param  string|null  $pipeline
     * @return mixed
     */
    public function pipe($object, $pipeline = null)
    {
        $pipeline = $pipeline ?: 'default';

        return call_user_func(
            $this-&gt;pipelines[$pipeline], new Pipeline($this-&gt;container), $object
        );
    }

    /**
     * Get the container instance used by the hub.
     *
     * @return \Illuminate\Contracts\Container\Container
     */
    public function getContainer()
    {
        return $this-&gt;container;
    }

    /**
     * Set the container instance used by the hub.
     *
     * @param  \Illuminate\Contracts\Container\Container  $container
     * @return $this
     */
    public function setContainer(Container $container)
    {
        $this-&gt;container = $container;

        return $this;
    }
}
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