Factory/FeedFactory.php
public function render($feed, $rendererName='rss')
    {
        $renderer = $this->getRenderer($rendererName);

        return $renderer->render($this->get($feed));
    }
public function render($feed, $rendererName='rss')
    {
        $renderer = $this->getRenderer($rendererName);

        return $renderer->render($this->get($feed));
    }
Renders a feed

@param $feed
@param $rendererName

@return string