diff --git a/core/lib/Drupal/Component/Plugin/DefaultPluginBag.php b/core/lib/Drupal/Component/Plugin/DefaultPluginBag.php
index 963422c..9ee6699 100644
--- a/core/lib/Drupal/Component/Plugin/DefaultPluginBag.php
+++ b/core/lib/Drupal/Component/Plugin/DefaultPluginBag.php
@@ -78,7 +78,7 @@ protected function initializePlugin($instance_id) {
       throw new UnknownPluginException($instance_id);
     }
     $this->pluginInstances[$instance_id] = $this->manager->createInstance($configuration[$this->pluginKey], $configuration);
-    $this->addInstanceID($instance_id);
+    $this->addInstanceId($instance_id);
   }
 
   /**
@@ -152,8 +152,8 @@ public function setConfiguration($instance_id, array $configuration) {
   /**
    * {@inheritdoc}
    */
-  public function removeInstanceID($instance_id) {
-    parent::removeInstanceID($instance_id);
+  public function removeInstanceId($instance_id) {
+    parent::removeInstanceId($instance_id);
     unset($this->originalOrder[$instance_id]);
     unset($this->configurations[$instance_id]);
   }
diff --git a/core/lib/Drupal/Component/Plugin/PluginBag.php b/core/lib/Drupal/Component/Plugin/PluginBag.php
index bb516ac..56f50a6 100644
--- a/core/lib/Drupal/Component/Plugin/PluginBag.php
+++ b/core/lib/Drupal/Component/Plugin/PluginBag.php
@@ -100,7 +100,7 @@ public function remove($instance_id) {
    * @param string $id
    *   The ID of the plugin instance to add.
    */
-  public function addInstanceID($id) {
+  public function addInstanceId($id) {
     if (!isset($this->instanceIDs[$id])) {
       $this->instanceIDs[$id] = $id;
     }
@@ -132,7 +132,7 @@ public function setInstanceIDs(array $instance_ids) {
    * @param string $instance_id
    *   An image effect instance IDs.
    */
-  public function removeInstanceID($instance_id) {
+  public function removeInstanceId($instance_id) {
     unset($this->instanceIDs[$instance_id]);
     $this->remove($instance_id);
   }
diff --git a/core/modules/image/lib/Drupal/image/Entity/ImageStyle.php b/core/modules/image/lib/Drupal/image/Entity/ImageStyle.php
index 42abf7c..4b8cf5a 100644
--- a/core/modules/image/lib/Drupal/image/Entity/ImageStyle.php
+++ b/core/modules/image/lib/Drupal/image/Entity/ImageStyle.php
@@ -340,7 +340,7 @@ public function getPathToken($uri) {
    * {@inheritdoc}
    */
   public function deleteImageEffect(ImageEffectInterface $effect) {
-    $this->getEffects()->removeInstanceID($effect->getUuid());
+    $this->getEffects()->removeInstanceId($effect->getUuid());
     $this->save();
     return $this;
   }
diff --git a/core/modules/image/lib/Drupal/image/ImageEffectBag.php b/core/modules/image/lib/Drupal/image/ImageEffectBag.php
index 9370fff..b5ffb12 100644
--- a/core/modules/image/lib/Drupal/image/ImageEffectBag.php
+++ b/core/modules/image/lib/Drupal/image/ImageEffectBag.php
@@ -44,7 +44,7 @@ public function updateConfiguration(array $configuration) {
     }
     $instance_id = $configuration['uuid'];
     $this->setConfiguration($instance_id, $configuration);
-    $this->addInstanceID($instance_id);
+    $this->addInstanceId($instance_id);
     return $instance_id;
   }
 
diff --git a/core/modules/system/lib/Drupal/system/Entity/Action.php b/core/modules/system/lib/Drupal/system/Entity/Action.php
index e2e7650..27ba395 100644
--- a/core/modules/system/lib/Drupal/system/Entity/Action.php
+++ b/core/modules/system/lib/Drupal/system/Entity/Action.php
@@ -106,7 +106,7 @@ public function getPlugin() {
    */
   public function setPlugin($plugin_id) {
     $this->plugin = $plugin_id;
-    $this->pluginBag->addInstanceID($plugin_id);
+    $this->pluginBag->addInstanceId($plugin_id);
   }
 
   /**
diff --git a/core/modules/views/lib/Drupal/views/ViewExecutable.php b/core/modules/views/lib/Drupal/views/ViewExecutable.php
index fe11e11..41050d6 100644
--- a/core/modules/views/lib/Drupal/views/ViewExecutable.php
+++ b/core/modules/views/lib/Drupal/views/ViewExecutable.php
@@ -720,7 +720,7 @@ public function newDisplay($plugin_id = 'page', $title = NULL, $id = NULL) {
     $this->initDisplay();
 
     $id = $this->storage->addDisplay($plugin_id, $title, $id);
-    $this->displayHandlers->addInstanceID($id);
+    $this->displayHandlers->addInstanceId($id);
 
     $display = $this->displayHandlers->get($id);
     $display->newDisplay();