Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/lib/Drupal/Component/FileCache/NullFileCache.php

@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Component\FileCache\NullFileCache.
+ */
+
+namespace Drupal\Component\FileCache;
+
+/**
+ * Null implementation for the file cache.
+ */
+class NullFileCache implements FileCacheInterface {
+
+  /**
+   * Constructs a FileCache object.
+   *
+   * @param string $prefix
+   *   A prefix that is used as a prefix, should be set to a secure, unique key
+   *   to prevent cache pollution by a third party.
+   * @param string $collection
+   *   A collection identifier to ensure that the same files could be cached for
+   *   different purposes without clashing.
+   * @param string|null $cache_backend_class
+   *   (optional) The class that should be used as cache backend.
+   * @param array $cache_backend_configuration
+   *   (optional) The configuration for the backend class.
+   */
+  public function __construct($prefix, $collection, $cache_backend_class = NULL, array $cache_backend_configuration = []) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function get($filepath) {
+    return NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getMultiple(array $filepaths) {
+    return [];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function set($filepath, $data) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function delete($filepath) {
+  }
+
+}