Renderer/RssRenderer.php
private function getComments(ItemInterface $item)
    {
        $commentRoute = $item->getFeedCommentRoute();
        if (!$commentRoute) {
            return null;
        } elseif (is_array($commentRoute)) {
            return $this->router->generate($commentRoute[0], $commentRoute[1]);
        } else {
            return $this->router->generate($commentRoute);
        }
    }
private function getComments(ItemInterface $item)
    {
        $commentRoute = $item->getFeedCommentRoute();
        if (!$commentRoute) {
            return null;
        } elseif (is_array($commentRoute)) {
            return $this->router->generate($commentRoute[0], $commentRoute[1]);
        } else {
            return $this->router->generate($commentRoute);
        }
    }
Extracts the Comments URI

@param \Nekland\Bundle\FeedBundle\Item\ExtendedItemInterface $item
@return null|string