diff -r 000000000000 -r 7f95f8617b0b vendor/symfony/src/Symfony/Component/Security/Acl/Model/DomainObjectInterface.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/Security/Acl/Model/DomainObjectInterface.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Security\Acl\Model;
+
+/**
+ * This method can be implemented by domain objects which you want to store
+ * ACLs for if they do not have a getId() method, or getId() does not return
+ * a unique identifier.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+interface DomainObjectInterface
+{
+    /**
+     * Returns a unique identifier for this domain object.
+     *
+     * @return string
+     */
+    function getObjectIdentifier();
+}