diff -r 000000000000 -r 7f95f8617b0b vendor/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/FrozenParameterBag.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/FrozenParameterBag.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,69 @@
+<?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\DependencyInjection\ParameterBag;
+
+/**
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @api
+ */
+class FrozenParameterBag extends ParameterBag
+{
+    /**
+     * Constructor.
+     *
+     * For performance reasons, the constructor assumes that
+     * all keys are already lowercased.
+     *
+     * This is always the case when used internally.
+     *
+     * @param array $parameters An array of parameters
+     *
+     * @api
+     */
+    public function __construct(array $parameters = array())
+    {
+        $this->parameters = $parameters;
+        $this->resolved = true;
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * @api
+     */
+    public function clear()
+    {
+        throw new \LogicException('Impossible to call clear() on a frozen ParameterBag.');
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * @api
+     */
+    public function add(array $parameters)
+    {
+        throw new \LogicException('Impossible to call add() on a frozen ParameterBag.');
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * @api
+     */
+    public function set($name, $value)
+    {
+        throw new \LogicException('Impossible to call set() on a frozen ParameterBag.');
+    }
+}