diff -r 000000000000 -r 7f95f8617b0b vendor/metadata/src/Metadata/Driver/DriverChain.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/metadata/src/Metadata/Driver/DriverChain.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * Copyright 2011 Johannes M. Schmitt <schmittjoh@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Metadata\Driver;
+
+final class DriverChain implements DriverInterface
+{
+    private $drivers;
+
+    public function __construct(array $drivers)
+    {
+        $this->drivers = $drivers;
+    }
+
+    public function loadMetadataForClass(\ReflectionClass $class)
+    {
+        foreach ($this->drivers as $driver) {
+            if (null !== $metadata = $driver->loadMetadataForClass($class)) {
+                return $metadata;
+            }
+        }
+
+        return null;
+    }
+}
\ No newline at end of file