xml/tests/testData/xml/anyAttribute.xml

<?xml version="1.0" ?>
<container xmlns="http://symfony.com/schema/dic/services">

    <services>
        <service id="example.form.type" class="Acme\ExampleBundle\Form\Type\ExampleFormType">
            <tag name="form.type" alias="example_form"/>
        </service>
    </services>
</container>