File: vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/translation_debug.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">

    <services>
        <!-- DataCollectorTranslator -->
        <service id="translator.data_collector" class="Symfony\Component\Translation\DataCollectorTranslator" public="false">
            <argument type="service" id="translator.data_collector.inner" />
        </service>

        <!-- DataCollector -->
        <service id="data_collector.translation" class="Symfony\Component\Translation\DataCollector\TranslationDataCollector">
            <tag name="data_collector" template="@WebProfiler/Collector/translation.html.twig" id="translation" priority="275" />
            <argument type="service" id="translator.data_collector" />
        </service>
    </services>
</container>