Twig update to latest Twig 1.x legacy as per vichan

inc/lib/Twig/RuntimeLoaderInterface.php

@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Creates runtime implementations for Twig elements (filters/functions/tests).
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_RuntimeLoaderInterface
+{
+    /**
+     * Creates the runtime implementation of a Twig element (filter/function/test).
+     *
+     * @param string $class A runtime class
+     *
+     * @return object|null The runtime instance or null if the loader does not know how to create the runtime for this class
+     */
+    public function load($class);
+}
+
+class_alias('Twig_RuntimeLoaderInterface', 'Twig\RuntimeLoader\RuntimeLoaderInterface', false);