public function load($feedName, $loaderName = 'rss_file')
    {
        $loader = $this->getLoader($loaderName);
        $feed = $this->get($feedName);
        $loadedFeed = $loader->load($feed->getFilename($loader->getFormat()));

        return $this->feeds[$feedName] = $feed->merge($loadedFeed);
    }