[symfony#4228] Moved requiring files to definitions

components/dependency_injection/advanced.rst

@@ -182,44 +182,3 @@ service by asking for the ``bar`` service like this::
            foo:
              class: Example\Foo
            bar: "@foo"
-
-
-Requiring Files
----------------
-
-There might be use cases when you need to include another file just before
-the service itself gets loaded. To do so, you can use the ``file`` directive.
-
-.. configuration-block::
-
-    .. code-block:: yaml
-
-        services:
-           foo:
-             class: Example\Foo\Bar
-             file: "%kernel.root_dir%/src/path/to/file/foo.php"
-
-    .. code-block:: 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="foo" class="Example\Foo\Bar">
-                    <file>%kernel.root_dir%/src/path/to/file/foo.php</file>
-                </service>
-            </services>
-        </container>
-
-    .. code-block:: php
-
-        use Symfony\Component\DependencyInjection\Definition;
-
-        $definition = new Definition('Example\Foo\Bar');
-        $definition->setFile('%kernel.root_dir%/src/path/to/file/foo.php');
-        $container->setDefinition('foo', $definition);
-
-Notice that Symfony will internally call the PHP statement ``require_once``,
-which means that your file will be included only once per request.

components/dependency_injection/definitions.rst

@@ -125,3 +125,15 @@ You can also replace any existing method calls with an array of new ones with::
     the container is compiled. Once the container is compiled you cannot
     manipulate service definitions further. To learn more about compiling
     the container see :doc:`/components/dependency_injection/compilation`.
+
+Requiring Files
+~~~~~~~~~~~~~~~
+
+There might be use cases when you need to include another file just before
+the service itself gets loaded. To do so, you can use the
+:method:`Symfony\\Component\\DependencyInjection\\Definition::setFile` method::
+
+    $definition->setFile('/src/path/to/file/foo.php');
+
+Notice that Symfony will internally call the PHP statement ``require_once``,
+which means that your file will be included only once per request.