class_from_id.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 https://symfony.com/schema/dic/services/services-1.0.xsd">
  <services>
    <service id="Symfony\Component\DependencyInjection\Tests\Fixtures\CaseSensitiveClass" public="true"/>
  </services>
</container>