diff --git a/core/lib/Drupal/Core/ProxyClass/Render/Strategy/RenderStrategyManager.php b/core/lib/Drupal/Core/ProxyClass/Render/Strategy/RenderStrategyManager.php
new file mode 100644
index 0000000..7200c4d
--- /dev/null
+++ b/core/lib/Drupal/Core/ProxyClass/Render/Strategy/RenderStrategyManager.php
@@ -0,0 +1,92 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\ProxyClass\Render\Strategy\RenderStrategyManager.
+ */
+
+/**
+ * This file was generated via php core/scripts/generate-proxy-class.php 'Drupal\Core\Render\Strategy\RenderStrategyManager' "core/lib/Drupal/Core".
+ */
+
+namespace Drupal\Core\ProxyClass\Render\Strategy {
+
+    /**
+     * Provides a proxy class for \Drupal\Core\Render\Strategy\RenderStrategyManager.
+     *
+     * @see \Drupal\Component\ProxyBuilder
+     */
+    class RenderStrategyManager implements \Drupal\Core\Render\Strategy\RenderStrategyManagerInterface
+    {
+
+        use \Drupal\Core\DependencyInjection\DependencySerializationTrait;
+
+        /**
+         * The id of the original proxied service.
+         *
+         * @var string
+         */
+        protected $drupalProxyOriginalServiceId;
+
+        /**
+         * The real proxied service, after it was lazy loaded.
+         *
+         * @var \Drupal\Core\Render\Strategy\RenderStrategyManager
+         */
+        protected $service;
+
+        /**
+         * The service container.
+         *
+         * @var \Symfony\Component\DependencyInjection\ContainerInterface
+         */
+        protected $container;
+
+        /**
+         * Constructs a ProxyClass Drupal proxy object.
+         *
+         * @param \Symfony\Component\DependencyInjection\ContainerInterface $container
+         *   The container.
+         * @param string $drupal_proxy_original_service_id
+         *   The service ID of the original service.
+         */
+        public function __construct(\Symfony\Component\DependencyInjection\ContainerInterface $container, $drupal_proxy_original_service_id)
+        {
+            $this->container = $container;
+            $this->drupalProxyOriginalServiceId = $drupal_proxy_original_service_id;
+        }
+
+        /**
+         * Lazy loads the real service from the container.
+         *
+         * @return object
+         *   Returns the constructed real service.
+         */
+        protected function lazyLoadItself()
+        {
+            if (!isset($this->service)) {
+                $this->service = $this->container->get($this->drupalProxyOriginalServiceId);
+            }
+
+            return $this->service;
+        }
+
+        /**
+         * {@inheritdoc}
+         */
+        public function addRenderStrategy(\Drupal\Core\Render\Strategy\RenderStrategyInterface $strategy)
+        {
+            return $this->lazyLoadItself()->addRenderStrategy($strategy);
+        }
+
+        /**
+         * {@inheritdoc}
+         */
+        public function processPlaceholders(array $placeholders)
+        {
+            return $this->lazyLoadItself()->processPlaceholders($placeholders);
+        }
+
+    }
+
+}