That URL is not public. But I know the contents of that page.. I should add something like this: 
```php
$config['backend']['message_headers']['dispatch_path'] = $container->get('kernel')
                ->locateResource('@FervoDeferredEventBundle/Resources/bin/dispatch.php', null, true);
```

This will return:
```batch
  The service definition "kernel" does not exist.
```

How do I get the Kernel?