Proxy Switcher decorator for Guzzle loader

proxy.php

<?php

use Guzzle\Http\ClientInterface;
use Valera\Loader\LoaderInterface;
use Valera\Resource;
use Valera\Loader\Result;

class ProxySwitcher implements LoaderInterface
{
    /**
     * @var Valera\Loader\LoaderInterface
     */
    private $loader;

    /**
     * @var Guzzle\Http\ClientInterface
     */
    private $client;

    public function __construct(LoaderInterface $loader, ClientInterface $client)
    {
        $this->loader = $loader;
        $this->client = $client;
    }

    public function load(Resource $resource, Result $result)
    {
        $config = $this->getConfig();
        $this->client->setConfig($config);
        $this->loader->load($resource, $result);
    }
}

$guzzle = new Guzzle\Http\Client();
$loader = new Valera\Loader\Guzzle($guzzle);
$proxy = new ProxySwitcher($loader, $guzzle);