File: //usr/share/php/Symfony/Bundle/FrameworkBundle/Resources/config/form_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 https://symfony.com/schema/dic/services/services-1.0.xsd">
<services>
<defaults public="false" />
<service id="form.resolved_type_factory" class="Symfony\Component\Form\Extension\DataCollector\Proxy\ResolvedTypeFactoryDataCollectorProxy">
<argument type="service">
<service class="Symfony\Component\Form\ResolvedFormTypeFactory" />
</argument>
<argument type="service" id="data_collector.form" />
</service>
<!-- DataCollectorTypeExtension -->
<service id="form.type_extension.form.data_collector" class="Symfony\Component\Form\Extension\DataCollector\Type\DataCollectorTypeExtension">
<tag name="form.type_extension" />
<argument type="service" id="data_collector.form" />
</service>
<!-- DataCollector -->
<service id="data_collector.form.extractor" class="Symfony\Component\Form\Extension\DataCollector\FormDataExtractor" />
<service id="data_collector.form" class="Symfony\Component\Form\Extension\DataCollector\FormDataCollector">
<tag name="data_collector" template="@WebProfiler/Collector/form.html.twig" id="form" priority="310" />
<argument type="service" id="data_collector.form.extractor" />
</service>
</services>
</container>