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

vendor/symfony/serializer/NameConverter/NameConverterInterface.php

@@ -0,0 +1,38 @@
+<?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\NameConverter;
+
+/**
+ * Defines the interface for property name converters.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+interface NameConverterInterface
+{
+    /**
+     * Converts a property name to its normalized value.
+     *
+     * @param string $propertyName
+     *
+     * @return string
+     */
+    public function normalize($propertyName);
+
+    /**
+     * Converts a property name to its denormalized value.
+     *
+     * @param string $propertyName
+     *
+     * @return string
+     */
+    public function denormalize($propertyName);
+}