services_with_tagged_arguments.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">
  <services>
    <service id="service_container" class="Symfony\Component\DependencyInjection\ContainerInterface" public="true" synthetic="true"/>
    <service id="foo" class="Foo">
      <tag name="foo_tag"/>
    </service>
    <service id="foo_tagged_iterator" class="Bar" public="true">
      <argument type="tagged" tag="foo_tag" index-by="barfoo" default-index-method="foobar"/>
    </service>
    <service id="Psr\Container\ContainerInterface" alias="service_container" public="false"/>
    <service id="Symfony\Component\DependencyInjection\ContainerInterface" alias="service_container" public="false"/>
  </services>
</container>