serializer.xml

<?xml version="1.0" ?>
<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">

    <parameters>
        <parameter key="fos_js_routing.normalizer.route_collection.class">FOS\JsRoutingBundle\Serializer\Normalizer\RouteCollectionNormalizer</parameter>
        <parameter key="fos_js_routing.normalizer.routes_response.class">FOS\JsRoutingBundle\Serializer\Normalizer\RoutesResponseNormalizer</parameter>

        <parameter key="fos_js_routing.denormalizer.route_collection.class">FOS\JsRoutingBundle\Serializer\Denormalizer\RouteCollectionDenormalizer</parameter>
    </parameters>

    <services>
        <service id="fos_js_routing.normalizer.route_collection" class="%fos_js_routing.normalizer.route_collection.class%" public="false">
            <tag name="serializer.normalizer" />
        </service>
        <service id="fos_js_routing.normalizer.routes_response" class="%fos_js_routing.normalizer.routes_response.class%" public="false">
            <tag name="serializer.normalizer" />
        </service>

        <service id="fos_js_routing.denormalizer.route_collection" class="%fos_js_routing.denormalizer.route_collection.class%" public="false">
            <tag name="serializer.normalizer" />
        </service>
    </services>
</container>