Symfony DependencyInjection Autowire

autowrite.php

<?php

namespace Eddy;

use Symfony\Component\DependencyInjection\Compiler\AutowirePass;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Definition;

require 'vendor/autoload.php';

$autowire = new AutowirePass();
$container = new ContainerBuilder();

$definition = new Definition(TwitterClient::class);
$definition->setAutowired(true);
$container->setDefinition('twitter_client', $definition);

$autowire->process($container);

$client = $container->get('twitter_client');

$client->tweet('user', 'key', 'rr');

class Rot13Transformer
{
    public function transform($value)
    {
        return str_rot13($value);
    }
}

class TwitterClient
{
    private $transformer;

    public function __construct(Rot13Transformer $transformer)
    {
        //$transformer = new Rot13Transformer();
        $this->transformer = $transformer;
    }

    public function tweet($user, $key, $status)
    {
        $transformedStatus = $this->transformer->transform($status);
        var_dump($transformedStatus);
        // ... connect to Twitter and send the encoded status
    }
}