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

vendor/symfony/translation/Dumper/DumperInterface.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\Dumper;
+
+use Symfony\Component\Translation\MessageCatalogue;
+
+/**
+ * DumperInterface is the interface implemented by all translation dumpers.
+ * There is no common option.
+ *
+ * @author Michel Salib <michelsalib@hotmail.com>
+ */
+interface DumperInterface
+{
+    /**
+     * Dumps the message catalogue.
+     *
+     * @param MessageCatalogue $messages The message catalogue
+     * @param array            $options  Options that are used by the dumper
+     */
+    public function dump(MessageCatalogue $messages, $options = array());
+}