diff -u b/core/modules/ckeditor/js/ckeditor.drupalimage.admin.js b/core/modules/ckeditor/js/ckeditor.drupalimage.admin.js
--- b/core/modules/ckeditor/js/ckeditor.drupalimage.admin.js
+++ b/core/modules/ckeditor/js/ckeditor.drupalimage.admin.js
@@ -11,6 +11,8 @@
    * Provides the summary for the "drupalimage" plugin settings vertical tab.
    *
    * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
    *   Attaches summary behaviour to the "drupalimage" settings vertical tab.
    */
   Drupal.behaviors.ckeditorDrupalImageSettingsSummary = {
only in patch2:
unchanged:
--- a/core/modules/ckeditor/js/views/ControllerView.js
+++ b/core/modules/ckeditor/js/views/ControllerView.js
@@ -234,6 +234,10 @@
      *
      * @param {object} features
      *   A map of {@link Drupal.EditorFeature} objects.
+     * @param {object} buttonsToFeatures
+     *   Object containing the button-to-feature mapping.
+     *
+     * @see Drupal.ckeditor.ControllerView#getFeatureForButton
      */
     disableFeaturesDisallowedByFilters: function (features, buttonsToFeatures) {
       this.model.set('featuresMetadata', features);