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vendor/twig/extra-bundle/DependencyInjection/Compiler/MissingExtensionSuggestorPass.php

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+<?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 Twig\Extra\TwigExtraBundle\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Reference;
+
+class MissingExtensionSuggestorPass implements CompilerPassInterface
+{
+    /** @return void */
+    public function process(ContainerBuilder $container)
+    {
+        if ($container->getParameter('kernel.debug')) {
+            $twigDefinition = $container->getDefinition('twig');
+            $twigDefinition
+                ->addMethodCall('registerUndefinedFilterCallback', [[new Reference('twig.missing_extension_suggestor'), 'suggestFilter']])
+                ->addMethodCall('registerUndefinedFunctionCallback', [[new Reference('twig.missing_extension_suggestor'), 'suggestFunction']])
+                ->addMethodCall('registerUndefinedTokenParserCallback', [[new Reference('twig.missing_extension_suggestor'), 'suggestTag']])
+            ;
+        }
+    }
+}