--- /dev/null
+<?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 http://symfony.com/schema/dic/services/services-1.0.xsd">
+ <services>
+ <service id="extension1.foo" class="FooClass1">
+ <argument type="service">
+ <service class="BarClass1">
+ </service>
+ </argument>
+ </service>
+ </services>
+</container>