diff --git a/core/lib/Drupal/Core/Plugin/PluginBase.php b/core/lib/Drupal/Core/Plugin/PluginBase.php
index 03f952a..b957185 100644
--- a/core/lib/Drupal/Core/Plugin/PluginBase.php
+++ b/core/lib/Drupal/Core/Plugin/PluginBase.php
@@ -8,6 +8,7 @@
 namespace Drupal\Core\Plugin;
 
 use Drupal\Component\Plugin\PluginBase as ComponentPluginBase;
+use Drupal\Core\Session\AccountInterface;
 use Drupal\Core\StringTranslation\TranslationInterface;
 
 /**
@@ -23,6 +24,39 @@
   protected $translationManager;
 
   /**
+   * Current user object.
+   *
+   * @var \Drupal\Core\Session\AccountInterface
+   */
+  protected $currentUser;
+
+  /**
+   * Gets the current active user.
+   *
+   * @return \Drupal\Core\Session\AccountInterface
+   */
+  public function currentUser() {
+    if (!$this->currentUser) {
+      $this->currentUser = \Drupal::currentUser();
+    }
+    return $this->currentUser;
+  }
+
+  /**
+   * Sets the current active user.
+   *
+   * @param \Drupal\Core\Session\AccountInterface $user
+   *   The current user.
+   *
+   * @return self
+   *   The plugin object.
+   */
+  public function setCurrentUser(AccountInterface $user) {
+    $this->currentUser = $user;
+    return $this;
+  }
+
+  /**
    * Translates a string to the current language or to a given language.
    *
    * See the t() documentation for details.