chamilo-lms2/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/Resources/config/validator.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 http://symfony.com/schema/dic/services/services-1.0.xsd">

    <parameters>
        <parameter key="fos_user.validator.password.class">FOS\UserBundle\Validator\PasswordValidator</parameter>
        <parameter key="fos_user.validator.unique.class">FOS\UserBundle\Validator\UniqueValidator</parameter>
    </parameters>

    <services>
        <service id="fos_user.validator.initializer" class="FOS\UserBundle\Validator\Initializer" public="false">
            <tag name="validator.initializer" />
            <argument type="service" id="fos_user.user_manager" />
        </service>
    </services>

</container>