diff --git a/core/modules/system/lib/Drupal/system/Plugin/MenuLocalTaskBase.php b/core/modules/system/lib/Drupal/system/Plugin/MenuLocalTaskBase.php
index 274f09b..8a16d4d 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/MenuLocalTaskBase.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/MenuLocalTaskBase.php
@@ -81,10 +81,7 @@ public function getRouteName() {
   }
 
   /**
-   * Returns the localized title to be shown for this tab.
-   *
-   * Subclasses may add arguments for request attributes which will then be
-   * automatically supplied by the controller resolver.
+   * {@inheritdoc}
    */
   public function getTitle() {
     // Subclasses may pull in the request or specific attributes as parameters.
@@ -92,10 +89,7 @@ public function getTitle() {
   }
 
   /**
-   * Returns an internal Drupal path to use when creating the link for the tab.
-   *
-   * Subclasses may add arguments for request attributes which will then be
-   * automatically supplied by the controller resolver.
+   * {@inheritdoc}
    */
   public function getPath() {
     // Subclasses may set a request into the generator or use any desired method
diff --git a/core/modules/system/lib/Drupal/system/Plugin/MenuLocalTaskInterface.php b/core/modules/system/lib/Drupal/system/Plugin/MenuLocalTaskInterface.php
index 0db9b1f..28aa3c4 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/MenuLocalTaskInterface.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/MenuLocalTaskInterface.php
@@ -21,6 +21,22 @@
   public function getRouteName();
 
   /**
+   * Returns the localized title to be shown for this tab.
+   *
+   * Subclasses may add optional arguments like NodeInterface $node = NULL that
+   * will be supplied by the ControllerResolver.
+   */
+  public function getTitle();
+
+  /**
+   * Returns an internal Drupal path to use when creating the link for the tab.
+   *
+   * Subclasses may add optional arguments like NodeInterface $node = NULL that
+   * will be supplied by the ControllerResolver.
+   */
+  public function getPath();
+
+  /**
    * Returns the weight of the local task.
    *
    * @return int|null
diff --git a/core/modules/system/lib/Drupal/system/Plugin/Type/MenuLocalTaskManager.php b/core/modules/system/lib/Drupal/system/Plugin/Type/MenuLocalTaskManager.php
index 6f3e247..86fea20 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/Type/MenuLocalTaskManager.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/Type/MenuLocalTaskManager.php
@@ -84,11 +84,8 @@ public function __construct(\Traversable $namespaces, ControllerResolverInterfac
    */
   public function getTitle(MenuLocalTaskInterface $local_task) {
     $controller = array($local_task, 'getTitle');
-    if (is_callable($controller)) {
-      $arguments = $this->controllerResolver->getArguments($this->request, $controller);
-      return call_user_func_array($controller, $arguments);
-    }
-    throw new \BadMethodCallException('Menu local task plugins must implement a getTitle() method.');
+    $arguments = $this->controllerResolver->getArguments($this->request, $controller);
+    return call_user_func_array($controller, $arguments);
   }
 
   /**
@@ -102,11 +99,8 @@ public function getTitle(MenuLocalTaskInterface $local_task) {
    */
   public function getPath(MenuLocalTaskInterface $local_task) {
     $controller = array($local_task, 'getPath');
-    if (is_callable($controller)) {
-      $arguments = $this->controllerResolver->getArguments($this->request, $controller);
-      return call_user_func_array($controller, $arguments);
-    }
-    throw new \BadMethodCallException('Menu local task plugins must implement a getPath() method.');
+    $arguments = $this->controllerResolver->getArguments($this->request, $controller);
+    return call_user_func_array($controller, $arguments);
   }
 
   /**