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

vendor/symfony/validator/Mapping/PropertyMetadataInterface.php

@@ -0,0 +1,37 @@
+<?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\Validator\Mapping;
+
+use Symfony\Component\Validator\ClassBasedInterface;
+use Symfony\Component\Validator\PropertyMetadataInterface as LegacyPropertyMetadataInterface;
+
+/**
+ * Stores all metadata needed for validating the value of a class property.
+ *
+ * Most importantly, the metadata stores the constraints against which the
+ * property's value should be validated.
+ *
+ * Additionally, the metadata stores whether objects stored in the property
+ * should be validated against their class' metadata and whether traversable
+ * objects should be traversed or not.
+ *
+ * @since  2.5
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @see MetadataInterface
+ * @see CascadingStrategy
+ * @see TraversalStrategy
+ */
+interface PropertyMetadataInterface extends MetadataInterface, LegacyPropertyMetadataInterface, ClassBasedInterface
+{
+}