Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/translation/TranslatorBagInterface.php

@@ -0,0 +1,31 @@
+<?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;
+
+/**
+ * TranslatorBagInterface.
+ *
+ * @author Abdellatif Ait boudad <a.aitboudad@gmail.com>
+ */
+interface TranslatorBagInterface
+{
+    /**
+     * Gets the catalogue by locale.
+     *
+     * @param string|null $locale The locale or null to use the default
+     *
+     * @throws \InvalidArgumentException If the locale contains invalid characters
+     *
+     * @return MessageCatalogueInterface
+     */
+    public function getCatalogue($locale = null);
+}