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diff --git a/vendor/symfony/translation/DependencyInjection/TranslatorPass.php b/vendor/symfony/translation/DependencyInjection/TranslatorPass.php
new file mode 100644
index 000000000..db2a2a1ec
--- /dev/null
+++ b/vendor/symfony/translation/DependencyInjection/TranslatorPass.php
@@ -0,0 +1,95 @@
+<?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\Translation\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\Compiler\ServiceLocatorTagPass;
+
+class TranslatorPass implements CompilerPassInterface
+{
+    private $translatorServiceId;
+    private $readerServiceId;
+    private $loaderTag;
+    private $debugCommandServiceId;
+    private $updateCommandServiceId;
+
+    public function __construct($translatorServiceId = 'translator.default', $readerServiceId = 'translation.loader', $loaderTag = 'translation.loader', $debugCommandServiceId = 'console.command.translation_debug', $updateCommandServiceId = 'console.command.translation_update')
+    {
+        if ('translation.loader' === $readerServiceId && 2 > func_num_args()) {
+            @trigger_error('The default value for $readerServiceId will change in 4.0 to "translation.reader".', E_USER_DEPRECATED);
+        }
+
+        $this->translatorServiceId = $translatorServiceId;
+        $this->readerServiceId = $readerServiceId;
+        $this->loaderTag = $loaderTag;
+        $this->debugCommandServiceId = $debugCommandServiceId;
+        $this->updateCommandServiceId = $updateCommandServiceId;
+    }
+
+    public function process(ContainerBuilder $container)
+    {
+        if (!$container->hasDefinition($this->translatorServiceId)) {
+            return;
+        }
+
+        $loaders = array();
+        $loaderRefs = array();
+        foreach ($container->findTaggedServiceIds($this->loaderTag, true) as $id => $attributes) {
+            $loaderRefs[$id] = new Reference($id);
+            $loaders[$id][] = $attributes[0]['alias'];
+            if (isset($attributes[0]['legacy-alias'])) {
+                $loaders[$id][] = $attributes[0]['legacy-alias'];
+            }
+        }
+
+        if ($container->hasDefinition($this->readerServiceId)) {
+            $definition = $container->getDefinition($this->readerServiceId);
+            foreach ($loaders as $id => $formats) {
+                foreach ($formats as $format) {
+                    $definition->addMethodCall('addLoader', array($format, $loaderRefs[$id]));
+                }
+            }
+        }
+
+        // Duplicated code to support "translation.reader", to be removed in 4.0
+        if ('translation.reader' !== $this->readerServiceId) {
+            if ($container->hasDefinition('translation.reader')) {
+                $definition = $container->getDefinition('translation.reader');
+                foreach ($loaders as $id => $formats) {
+                    foreach ($formats as $format) {
+                        $definition->addMethodCall('addLoader', array($format, $loaderRefs[$id]));
+                    }
+                }
+            }
+        }
+
+        $container
+            ->findDefinition($this->translatorServiceId)
+            ->replaceArgument(0, ServiceLocatorTagPass::register($container, $loaderRefs))
+            ->replaceArgument(3, $loaders)
+        ;
+
+        if (!$container->hasParameter('twig.default_path')) {
+            return;
+        }
+
+        if ($container->hasDefinition($this->debugCommandServiceId)) {
+            $container->getDefinition($this->debugCommandServiceId)->replaceArgument(4, $container->getParameter('twig.default_path'));
+        }
+
+        if ($container->hasDefinition($this->updateCommandServiceId)) {
+            $container->getDefinition($this->updateCommandServiceId)->replaceArgument(5, $container->getParameter('twig.default_path'));
+        }
+    }
+}