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

vendor/symfony/serializer/Normalizer/NormalizerInterface.php

@@ -0,0 +1,41 @@
+<?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\Serializer\Normalizer;
+
+/**
+ * Defines the interface of normalizers.
+ *
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+interface NormalizerInterface
+{
+    /**
+     * Normalizes an object into a set of arrays/scalars.
+     *
+     * @param object $object  object to normalize
+     * @param string $format  format the normalization result will be encoded as
+     * @param array  $context Context options for the normalizer
+     *
+     * @return array|string|bool|int|float|null
+     */
+    public function normalize($object, $format = null, array $context = array());
+
+    /**
+     * Checks whether the given class is supported for normalization by this normalizer.
+     *
+     * @param mixed  $data   Data to normalize.
+     * @param string $format The format being (de-)serialized from or into.
+     *
+     * @return bool
+     */
+    public function supportsNormalization($data, $format = null);
+}