chamilo-lms2/vendor/sonata-project/admin-bundle/Resources/config/menu.xml

<?xml version="1.0" encoding="UTF-8"?>
<container xmlns="http://symfony.com/schema/dic/services" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
    <services>
        <service id="sonata.admin.menu_builder" class="Sonata\AdminBundle\Menu\MenuBuilder">
            <argument type="service" id="sonata.admin.pool"/>
            <argument type="service" id="knp_menu.factory"/>
            <argument type="service" id="knp_menu.menu_provider"/>
            <argument type="service" id="event_dispatcher"/>
        </service>
        <service id="sonata.admin.sidebar_menu" class="Knp\Menu\MenuItem">
            <tag name="knp_menu.menu" alias="sonata_admin_sidebar"/>
        </service>
        <!--NEXT_MAJOR: Replace empty argument with security.authorization_checker service when bumping requirements to >=Symfony 2.6 -->
        <service id="sonata.admin.menu.group_provider" class="Sonata\AdminBundle\Menu\Provider\GroupMenuProvider" public="false">
            <argument type="service" id="knp_menu.factory"/>
            <argument type="service" id="sonata.admin.pool"/>
            <argument/>
            <tag name="knp_menu.provider"/>
        </service>
        <service id="sonata.admin.menu.matcher.voter.admin" class="Sonata\AdminBundle\Menu\Matcher\Voter\AdminVoter">
            <tag name="knp_menu.voter" request="true"/>
        </service>
        <service id="sonata.admin.menu.matcher.voter.children" class="Sonata\AdminBundle\Menu\Matcher\Voter\ChildrenVoter">
            <argument type="service" id="knp_menu.matcher"/>
            <tag name="knp_menu.voter"/>
        </service>
        <service id="sonata.admin.menu.matcher.voter.active" class="Sonata\AdminBundle\Menu\Matcher\Voter\ActiveVoter">
            <tag name="knp_menu.voter"/>
        </service>
    </services>
</container>