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

vendor/zendframework/zend-hydrator/src/ArraySerializable.php

@@ -0,0 +1,81 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Hydrator;
+
+class ArraySerializable extends AbstractHydrator
+{
+    /**
+     * Extract values from the provided object
+     *
+     * Extracts values via the object's getArrayCopy() method.
+     *
+     * @param  object $object
+     * @return array
+     * @throws Exception\BadMethodCallException for an $object not implementing getArrayCopy()
+     */
+    public function extract($object)
+    {
+        if (! is_callable([$object, 'getArrayCopy'])) {
+            throw new Exception\BadMethodCallException(
+                sprintf('%s expects the provided object to implement getArrayCopy()', __METHOD__)
+            );
+        }
+
+        $data   = $object->getArrayCopy();
+        $filter = $this->getFilter();
+
+        foreach ($data as $name => $value) {
+            if (!$filter->filter($name)) {
+                unset($data[$name]);
+                continue;
+            }
+            $extractedName = $this->extractName($name, $object);
+            // replace the original key with extracted, if differ
+            if ($extractedName !== $name) {
+                unset($data[$name]);
+                $name = $extractedName;
+            }
+            $data[$name] = $this->extractValue($name, $value, $object);
+        }
+
+        return $data;
+    }
+
+    /**
+     * Hydrate an object
+     *
+     * Hydrates an object by passing $data to either its exchangeArray() or
+     * populate() method.
+     *
+     * @param  array $data
+     * @param  object $object
+     * @return object
+     * @throws Exception\BadMethodCallException for an $object not implementing exchangeArray() or populate()
+     */
+    public function hydrate(array $data, $object)
+    {
+        $replacement = [];
+        foreach ($data as $key => $value) {
+            $name = $this->hydrateName($key, $data);
+            $replacement[$name] = $this->hydrateValue($name, $value, $data);
+        }
+
+        if (is_callable([$object, 'exchangeArray'])) {
+            $object->exchangeArray($replacement);
+        } elseif (is_callable([$object, 'populate'])) {
+            $object->populate($replacement);
+        } else {
+            throw new Exception\BadMethodCallException(
+                sprintf('%s expects the provided object to implement exchangeArray() or populate()', __METHOD__)
+            );
+        }
+        return $object;
+    }
+}