````xml
<symfony-cmf-blog:controllers-by-class
    class="Symfony\CmfBundle\BlogBundle\Document\Post">
    symfony_cmf_blog.blog_controller:listAction
</symfony-cmf-blog:controllers-by-class>
````

(We should use some `fixXmlFormat` things in the configuration in the CMF bundles, I can submit a PR for that if you want)