diff -u b/core/lib/Drupal/Core/Menu/MenuTreeParameters.php b/core/lib/Drupal/Core/Menu/MenuTreeParameters.php
--- b/core/lib/Drupal/Core/Menu/MenuTreeParameters.php
+++ b/core/lib/Drupal/Core/Menu/MenuTreeParameters.php
@@ -188,7 +188,7 @@
    *
    * @return $this
    */
-  public function onyEnabledLinks() {
+  public function onlyEnabledLinks() {
     $this->addCondition('enabled', 1);
     return $this;
   }
diff -u b/core/lib/Drupal/Core/Menu/MenuTreeStorage.php b/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
--- b/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
+++ b/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
@@ -995,7 +995,7 @@
       return $tree;
     }
     $parameters = new MenuTreeParameters();
-    $parameters->setRoot($id)->onyEnabledLinks();
+    $parameters->setRoot($id)->onlyEnabledLinks();
     return $this->loadTreeData($root['menu_name'], $parameters);
   }
 
@@ -1055,7 +1055,7 @@
    */
   public function loadAllChildren($id, $max_relative_depth = NULL) {
     $parameters = new MenuTreeParameters();
-    $parameters->setRoot($id)->excludeRoot()->setMaxDepth($max_relative_depth)->onyEnabledLinks();
+    $parameters->setRoot($id)->excludeRoot()->setMaxDepth($max_relative_depth)->onlyEnabledLinks();
     $links = $this->loadLinks(NULL, $parameters);
     foreach ($links as $id => $link) {
       $links[$id] = $this->prepareLink($link);
diff -u b/core/modules/system/src/Controller/SystemController.php b/core/modules/system/src/Controller/SystemController.php
--- b/core/modules/system/src/Controller/SystemController.php
+++ b/core/modules/system/src/Controller/SystemController.php
@@ -120,7 +120,7 @@
     }
     // Load all menu links below it.
     $parameters = new MenuTreeParameters();
-    $parameters->setRoot($link_id)->excludeRoot()->setTopLevelOnly()->onyEnabledLinks();
+    $parameters->setRoot($link_id)->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
     $tree = $this->menuLinkTree->load(NULL, $parameters);
     $manipulators = array(
       array('callable' => 'menu.default_tree_manipulators:checkAccess'),
diff -u b/core/modules/system/src/SystemManager.php b/core/modules/system/src/SystemManager.php
--- b/core/modules/system/src/SystemManager.php
+++ b/core/modules/system/src/SystemManager.php
@@ -217,7 +217,7 @@
     // Only find the children of this link.
     $link_id = $instance->getPluginId();
     $parameters = new MenuTreeParameters();
-    $parameters->setRoot($link_id)->excludeRoot()->setTopLevelOnly()->onyEnabledLinks();
+    $parameters->setRoot($link_id)->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
     $tree = $this->menuTree->load(NULL, $parameters);
     $manipulators = array(
       array('callable' => 'menu.default_tree_manipulators:checkAccess'),
diff -u b/core/modules/system/src/Tests/System/AdminTest.php b/core/modules/system/src/Tests/System/AdminTest.php
--- b/core/modules/system/src/Tests/System/AdminTest.php
+++ b/core/modules/system/src/Tests/System/AdminTest.php
@@ -128,7 +128,7 @@
 
     // The system.admin link is normally the parent of all top-level admin links.
     $parameters = new MenuTreeParameters();
-    $parameters->setRoot('system.admin')->excludeRoot()->setTopLevelOnly()->onyEnabledLinks();
+    $parameters->setRoot('system.admin')->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
     $tree = $menu_tree->load(NULL, $parameters);
     $manipulators = array(
       array('callable' => 'menu.default_tree_manipulators:checkAccess'),
diff -u b/core/modules/system/system.module b/core/modules/system/system.module
--- b/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -1468,7 +1468,7 @@
 
   if (!isset($tree)) {
     $parameters = new MenuTreeParameters();
-    $parameters->setRoot('system.admin')->excludeRoot()->onyEnabledLinks();
+    $parameters->setRoot('system.admin')->excludeRoot()->onlyEnabledLinks();
     $tree = $menu_tree->load('system.admin', $parameters);
     $manipulators = array(
       array('callable' => 'menu.default_tree_manipulators:checkAccess'),
diff -u b/core/modules/toolbar/toolbar.module b/core/modules/toolbar/toolbar.module
--- b/core/modules/toolbar/toolbar.module
+++ b/core/modules/toolbar/toolbar.module
@@ -417,7 +417,7 @@
   $menu_tree = \Drupal::menuTree();
   // Render the top-level administration menu links.
   $parameters = new MenuTreeParameters();
-  $parameters->setRoot('system.admin')->excludeRoot()->setTopLevelOnly()->onyEnabledLinks();
+  $parameters->setRoot('system.admin')->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
   $tree = $menu_tree->load(NULL, $parameters);
   $manipulators = array(
     array('callable' => 'menu.default_tree_manipulators:checkAccess'),
@@ -475,7 +475,7 @@
 function toolbar_get_rendered_subtrees() {
   $menu_tree = \Drupal::menuTree();
   $parameters = new MenuTreeParameters();
-  $parameters->setRoot('system.admin')->excludeRoot()->setMaxDepth(3)->onyEnabledLinks();
+  $parameters->setRoot('system.admin')->excludeRoot()->setMaxDepth(3)->onlyEnabledLinks();
   $tree = $menu_tree->load(NULL, $parameters);
   $manipulators = array(
     array('callable' => 'menu.default_tree_manipulators:checkAccess'),
diff -u b/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php b/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
--- b/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
@@ -115,13 +115,13 @@
   }
 
   /**
-   * Tests onyEnabledLinks().
+   * Tests onlyEnabledLinks().
    *
-   * @covers ::onyEnabledLinks
+   * @covers ::onlyEnabledLinks
    */
   public function testExcludeDisabledLinks() {
     $parameters = new MenuTreeParameters();
-    $parameters->onyEnabledLinks();
+    $parameters->onlyEnabledLinks();
     $this->assertEquals(1, $parameters->conditions['enabled']);
   }