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

vendor/symfony/validator/PropertyMetadataContainerInterface.php

@@ -0,0 +1,45 @@
+<?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;
+
+/**
+ * A container for {@link PropertyMetadataInterface} instances.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @deprecated since version 2.5, to be removed in 3.0.
+ *             Use {@link Mapping\ClassMetadataInterface} instead.
+ */
+interface PropertyMetadataContainerInterface
+{
+    /**
+     * Check if there's any metadata attached to the given named property.
+     *
+     * @param string $property The property name.
+     *
+     * @return bool
+     */
+    public function hasPropertyMetadata($property);
+
+    /**
+     * Returns all metadata instances for the given named property.
+     *
+     * If your implementation does not support properties, simply throw an
+     * exception in this method (for example a <tt>BadMethodCallException</tt>).
+     *
+     * @param string $property The property name.
+     *
+     * @return PropertyMetadataInterface[] A list of metadata instances. Empty if
+     *                                     no metadata exists for the property.
+     */
+    public function getPropertyMetadata($property);
+}