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

inc/lib/Twig/SourceContextLoaderInterface.php

@@ -0,0 +1,33 @@
+<?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.
+ */
+
+/**
+ * Adds a getSourceContext() method for loaders.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.27 (to be removed in 3.0)
+ */
+interface Twig_SourceContextLoaderInterface
+{
+    /**
+     * Returns the source context for a given template logical name.
+     *
+     * @param string $name The template logical name
+     *
+     * @return Twig_Source
+     *
+     * @throws Twig_Error_Loader When $name is not found
+     */
+    public function getSourceContext($name);
+}
+
+class_alias('Twig_SourceContextLoaderInterface', 'Twig\Loader\SourceContextLoaderInterface', false);