--- /dev/null
+<?php
+
+namespace Drupal\Core\Action;
+
+use Drupal\Component\Plugin\CategorizingPluginManagerInterface;
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Plugin\CategorizingPluginManagerTrait;
+use Drupal\Core\Plugin\DefaultPluginManager;
+
+/**
+ * Provides an Action plugin manager.
+ *
+ * @see \Drupal\Core\Annotation\Action
+ * @see \Drupal\Core\Action\ActionInterface
+ * @see \Drupal\Core\Action\ActionBase
+ * @see plugin_api
+ */
+class ActionManager extends DefaultPluginManager implements CategorizingPluginManagerInterface {
+
+ use CategorizingPluginManagerTrait;
+
+ /**
+ * Constructs a new class instance.
+ *
+ * @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/Action', $namespaces, $module_handler, 'Drupal\Core\Action\ActionInterface', 'Drupal\Core\Annotation\Action');
+ $this->alterInfo('action_info');
+ $this->setCacheBackend($cache_backend, 'action_info');
+ }
+
+ /**
+ * Gets the plugin definitions for this entity type.
+ *
+ * @param string $type
+ * The entity type name.
+ *
+ * @return array
+ * An array of plugin definitions for this entity type.
+ */
+ public function getDefinitionsByType($type) {
+ return array_filter($this->getDefinitions(), function ($definition) use ($type) {
+ return $definition['type'] === $type;
+ });
+ }
+
+}