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

core/modules/tour/src/TipPluginManager.php

@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\tour\TipPluginManager.
+ */
+
+namespace Drupal\tour;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Plugin\DefaultPluginManager;
+
+/**
+ * Provides a plugin manager for tour items.
+ *
+ * @see \Drupal\tour\Annotation\Tip
+ * @see \Drupal\tour\TipPluginBase
+ * @see \Drupal\tour\TipPluginInterface
+ * @see plugin_api
+ */
+class TipPluginManager extends DefaultPluginManager {
+
+  /**
+   * Constructs a new TipPluginManager.
+   *
+   * @param \Traversable $namespaces
+   *   An object that implements \Traversable which contains the root paths
+   *   keyed by the corresponding namespace to look for plugin implementations,
+   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
+   *   Cache backend instance to use.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler to invoke the alter hook with.
+   */
+  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
+    parent::__construct('Plugin/tour/tip', $namespaces, $module_handler, 'Drupal\tour\TipPluginInterface', 'Drupal\tour\Annotation\Tip');
+
+    $this->alterInfo('tour_tips_info');
+    $this->setCacheBackend($cache_backend, 'tour_plugins');
+  }
+
+}