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

vendor/symfony/validator/PropertyMetadataInterface.php

@@ -0,0 +1,46 @@
+<?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 validation metadata of a property.
+ *
+ * What exactly you define as "property" is up to you. The validator expects
+ * implementations of {@link MetadataInterface} that contain constraints and
+ * optionally a list of named properties that also have constraints (and may
+ * have further sub properties). Such properties are mapped by implementations
+ * of this interface.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @see MetadataInterface
+ * @deprecated since version 2.5, to be removed in 3.0.
+ *             Use {@link Mapping\PropertyMetadataInterface} instead.
+ */
+interface PropertyMetadataInterface extends MetadataInterface
+{
+    /**
+     * Returns the name of the property.
+     *
+     * @return string The property name.
+     */
+    public function getPropertyName();
+
+    /**
+     * Extracts the value of the property from the given container.
+     *
+     * @param mixed $containingValue The container to extract the property value from.
+     *
+     * @return mixed The value of the property.
+     */
+    public function getPropertyValue($containingValue);
+}