diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
index a9b6d97..d23341b 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
@@ -220,9 +220,9 @@ public function save(EntityInterface $entity) {
     // @see \Drupal\Core\Config\Entity\ConfigEntityStorage::MAX_ID_LENGTH
     // @todo Consider moving this to a protected method on the parent class, and
     //   abstracting it for all entity types.
-    if (strlen($entity->{$this->idKey}) > self::MAX_ID_LENGTH) {
+    if (strlen($entity->get($this->idKey)) > self::MAX_ID_LENGTH) {
       throw new ConfigEntityIdLengthException(String::format('Configuration entity ID @id exceeds maximum allowed length of @length characters.', array(
-        '@id' => $entity->{$this->idKey},
+        '@id' => $entity->get($this->idKey),
         '@length' => self::MAX_ID_LENGTH,
       )));
     }
diff --git a/core/modules/ckeditor/ckeditor.admin.inc b/core/modules/ckeditor/ckeditor.admin.inc
index 7d763c7..373ebd2 100644
--- a/core/modules/ckeditor/ckeditor.admin.inc
+++ b/core/modules/ckeditor/ckeditor.admin.inc
@@ -39,7 +39,8 @@ function template_preprocess_ckeditor_settings_toolbar(&$variables) {
   }
   $button_groups = array();
   $active_buttons = array();
-  foreach ($editor->settings['toolbar']['rows'] as $row_number => $row) {
+  $settings = $editor->getSettings();
+  foreach ($settings['toolbar']['rows'] as $row_number => $row) {
     $button_groups[$row_number] = array();
     foreach ($row as $group) {
       foreach ($group['items'] as $button_name) {
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginContextualInterface.php b/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginContextualInterface.php
index a270742..38d53c7 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginContextualInterface.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginContextualInterface.php
@@ -27,7 +27,7 @@
   /**
    * Checks if this plugin should be enabled based on the editor configuration.
    *
-   * The editor's settings can be found in $editor->settings.
+   * The editor's settings can be retrieved via $editor->getSettings().
    *
    * @param \Drupal\editor\Entity\Editor $editor
    *   A configured text editor object.
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginInterface.php b/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginInterface.php
index c070fbd..2bc991e 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginInterface.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginInterface.php
@@ -79,11 +79,15 @@ public function getFile();
   /**
    * Returns the additions to CKEDITOR.config for a specific CKEditor instance.
    *
-   * The editor's settings can be found in $editor->settings, but be aware that
-   * it may not yet contain plugin-specific settings, because the user may not
-   * yet have configured the form.
+   * The editor's settings can be retrieved via $editor->getSettings(), but be
+   * aware that it may not yet contain plugin-specific settings, because the
+   * user may not yet have configured the form.
    * If there are plugin-specific settings (verify with isset()), they can be
-   * found at $editor->settings['plugins'][$plugin_id].
+   * found at
+   * @code
+   * $settings = $editor->getSettings();
+   * $plugin_specific_settings = $settings['plugins'][$plugin_id];
+   * @endcode
    *
    * @param \Drupal\editor\Entity\Editor $editor
    *   A configured text editor object.
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginManager.php b/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginManager.php
index 7cc3b19..677bf99 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginManager.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginManager.php
@@ -67,8 +67,9 @@ public function getEnabledPluginFiles(Editor $editor, $include_internal_plugins
     $plugins = array_keys($this->getDefinitions());
     // Flatten each row.
     $toolbar_rows = array();
-    foreach ($editor->settings['toolbar']['rows'] as $row_number => $row) {
-      $toolbar_rows[] = array_reduce($editor->settings['toolbar']['rows'][$row_number], function (&$result, $button_group) {
+    $settings = $editor->getSettings();
+    foreach ($settings['toolbar']['rows'] as $row_number => $row) {
+      $toolbar_rows[] = array_reduce($settings['toolbar']['rows'][$row_number], function (&$result, $button_group) {
         return array_merge($result, $button_group['items']);
       }, array());
     }
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/DrupalImage.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/DrupalImage.php
index 04469c9..d9f411c 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/DrupalImage.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/DrupalImage.php
@@ -85,7 +85,7 @@ public function settingsForm(array $form, array &$form_state, Editor $editor) {
    */
   function validateImageUploadSettings(array $element, array &$form_state) {
     $settings = &$form_state['values']['editor']['settings']['plugins']['drupalimage']['image_upload'];
-    $form_state['editor']->image_upload = $settings;
+    $form_state['editor']->setImageUploadSettings($settings);
     unset($form_state['values']['editor']['settings']['plugins']['drupalimage']);
   }
 
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/DrupalImageCaption.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/DrupalImageCaption.php
index 17881ce..1167525 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/DrupalImageCaption.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/DrupalImageCaption.php
@@ -69,7 +69,8 @@ function isEnabled(Editor $editor) {
     // enabled.
     if ($editor->getFilterFormat()->filters('filter_caption')->status) {
       $enabled = FALSE;
-      foreach ($editor->settings['toolbar']['rows'] as $row) {
+      $settings = $editor->getSettings();
+      foreach ($settings['toolbar']['rows'] as $row) {
         foreach ($row as $group) {
           foreach ($group['items'] as $button) {
             if ($button === 'DrupalImage') {
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/Internal.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/Internal.php
index 1e6eb5f..a82ce18 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/Internal.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/Internal.php
@@ -55,8 +55,9 @@ public function getConfig(Editor $editor) {
 
     // Add the format_tags setting, if its button is enabled.
     $toolbar_rows = array();
-    foreach ($editor->settings['toolbar']['rows'] as $row_number => $row) {
-      $toolbar_rows[] = array_reduce($editor->settings['toolbar']['rows'][$row_number], function (&$result, $button_group) {
+    $settings = $editor->getSettings();
+    foreach ($settings['toolbar']['rows'] as $row_number => $row) {
+      $toolbar_rows[] = array_reduce($settings['toolbar']['rows'][$row_number], function (&$result, $button_group) {
         return array_merge($result, $button_group['items']);
       }, array());
     }
@@ -259,7 +260,7 @@ protected function generateFormatTagsSetting(Editor $editor) {
     $possible_format_tags = array('h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'pre');
     foreach ($possible_format_tags as $tag) {
       $input = '<' . $tag . '>TEST</' . $tag . '>';
-      $output = trim(check_markup($input, $editor->format, '', TRUE));
+      $output = trim(check_markup($input, $editor->id(), '', TRUE));
       if ($input == $output) {
         $format_tags[] = $tag;
       }
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/StylesCombo.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/StylesCombo.php
index 9b6142d..2184cf2 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/StylesCombo.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/CKEditorPlugin/StylesCombo.php
@@ -42,10 +42,11 @@ public function getFile() {
    */
   public function getConfig(Editor $editor) {
     $config = array();
-    if (!isset($editor->settings['plugins']['stylescombo']['styles'])) {
+    $settings = $editor->getSettings();
+    if (!isset($settings['plugins']['stylescombo']['styles'])) {
       return $config;
     }
-    $styles = $editor->settings['plugins']['stylescombo']['styles'];
+    $styles = $settings['plugins']['stylescombo']['styles'];
     $config['stylesSet'] = $this->generateStylesSetSetting($styles);
     return $config;
   }
@@ -68,8 +69,9 @@ public function getButtons() {
   public function settingsForm(array $form, array &$form_state, Editor $editor) {
     // Defaults.
     $config = array('styles' => '');
-    if (isset($editor->settings['plugins']['stylescombo'])) {
-      $config = $editor->settings['plugins']['stylescombo'];
+    $settings = $editor->getSettings();
+    if (isset($settings['plugins']['stylescombo'])) {
+      $config = $settings['plugins']['stylescombo'];
     }
 
     $form['styles'] = array(
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/Editor/CKEditor.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/Editor/CKEditor.php
index f248e22..cc6af2f 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/Editor/CKEditor.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/Editor/CKEditor.php
@@ -129,6 +129,8 @@ public function getDefaultSettings() {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, array &$form_state, EditorEntity $editor) {
+    $settings = $editor->getSettings();
+
     $ckeditor_settings_toolbar = array(
       '#theme' => 'ckeditor_settings_toolbar',
       '#editor' => $editor,
@@ -153,7 +155,7 @@ public function settingsForm(array $form, array &$form_state, EditorEntity $edit
     $form['toolbar']['button_groups'] = array(
       '#type' => 'textarea',
       '#title' => t('Toolbar buttons'),
-      '#default_value' => json_encode($editor->settings['toolbar']['rows']),
+      '#default_value' => json_encode($settings['toolbar']['rows']),
       '#attributes' => array('class' => array('ckeditor-toolbar-textarea')),
     );
 
@@ -206,7 +208,7 @@ public function settingsForm(array $form, array &$form_state, EditorEntity $edit
            )
          ),
         ),
-        'plugins' => $editor->settings['plugins'],
+        'plugins' => $settings['plugins'],
       ),
     ));
     $config = $this->getJSSettings($fake_editor);
@@ -380,7 +382,9 @@ public function getLibraries(EditorEntity $editor) {
    */
   public function buildToolbarJSSetting(EditorEntity $editor) {
     $toolbar = array();
-    foreach ($editor->settings['toolbar']['rows'] as $row) {
+
+    $settings = $editor->getSettings();
+    foreach ($settings['toolbar']['rows'] as $row) {
       foreach ($row as $group) {
         $toolbar[] = $group;
       }
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorAdminTest.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorAdminTest.php
index 4b2e086..4680f9e 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorAdminTest.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorAdminTest.php
@@ -130,7 +130,7 @@ function testAdmin() {
     $expected_settings['plugins']['stylescombo']['styles'] = '';
     $editor = entity_load('editor', 'filtered_html');
     $this->assertTrue($editor instanceof Editor, 'An Editor config entity exists now.');
-    $this->assertIdentical($expected_settings, $editor->settings, 'The Editor config entity has the correct settings.');
+    $this->assertIdentical($expected_settings, $editor->getSettings(), 'The Editor config entity has the correct settings.');
 
     // Configure the Styles plugin, and ensure the updated settings are saved.
     $this->drupalGet('admin/config/content/formats/manage/filtered_html');
@@ -141,7 +141,7 @@ function testAdmin() {
     $expected_settings['plugins']['stylescombo']['styles'] = "h1.title|Title\np.callout|Callout\n\n";
     $editor = entity_load('editor', 'filtered_html');
     $this->assertTrue($editor instanceof Editor, 'An Editor config entity exists.');
-    $this->assertIdentical($expected_settings, $editor->settings, 'The Editor config entity has the correct settings.');
+    $this->assertIdentical($expected_settings, $editor->getSettings(), 'The Editor config entity has the correct settings.');
 
     // Change the buttons that appear on the toolbar (in JavaScript, this is
     // done via drag and drop, but here we can only emulate the end result of
@@ -158,7 +158,7 @@ function testAdmin() {
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $editor = entity_load('editor', 'filtered_html');
     $this->assertTrue($editor instanceof Editor, 'An Editor config entity exists.');
-    $this->assertIdentical($expected_settings, $editor->settings, 'The Editor config entity has the correct settings.');
+    $this->assertIdentical($expected_settings, $editor->getSettings(), 'The Editor config entity has the correct settings.');
 
     // Now enable the ckeditor_test module, which provides one configurable
     // CKEditor plugin — this should not affect the Editor config entity.
@@ -170,7 +170,7 @@ function testAdmin() {
     $this->assertTrue(count($ultra_llama_mode_checkbox) === 1, 'The "Ultra llama mode" checkbox exists and is not checked.');
     $editor = entity_load('editor', 'filtered_html');
     $this->assertTrue($editor instanceof Editor, 'An Editor config entity exists.');
-    $this->assertIdentical($expected_settings, $editor->settings, 'The Editor config entity has the correct settings.');
+    $this->assertIdentical($expected_settings, $editor->getSettings(), 'The Editor config entity has the correct settings.');
 
     // Finally, check the "Ultra llama mode" checkbox.
     $this->drupalGet('admin/config/content/formats/manage/filtered_html');
@@ -184,7 +184,7 @@ function testAdmin() {
     $expected_settings['plugins']['llama_contextual_and_button']['ultra_llama_mode'] = 1;
     $editor = entity_load('editor', 'filtered_html');
     $this->assertTrue($editor instanceof Editor, 'An Editor config entity exists.');
-    $this->assertIdentical($expected_settings, $editor->settings);
+    $this->assertIdentical($expected_settings, $editor->getSettings());
   }
 
 }
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorLoadingTest.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorLoadingTest.php
index fa3fc7a..e4231a3 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorLoadingTest.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorLoadingTest.php
@@ -123,7 +123,9 @@ function testLoading() {
     // don't test that here.
     \Drupal::moduleHandler()->install(array('ckeditor_test'));
     $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
-    $editor->settings['toolbar']['buttons'][0][] = 'Llama';
+    $editor_settings = $editor->getSettings();
+    $editor_settings['toolbar']['buttons'][0][] = 'Llama';
+    $editor->setSettings($editor_settings);
     $editor->save();
     $this->drupalGet('node/add/article');
     list($settings, $editor_settings_present, $editor_js_present, $body, $format_selector) = $this->getThingsToCheck();
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorPluginManagerTest.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorPluginManagerTest.php
index 40485ee..a679191 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorPluginManagerTest.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorPluginManagerTest.php
@@ -104,8 +104,10 @@ function testEnabledPlugins() {
     // cause the LlamaContextual and LlamaContextualAndButton plugins to be
     // enabled. Finally, we will add the "Strike" button back again, which would
     // cause all three plugins to be enabled.
-    $original_toolbar = $editor->settings['toolbar'];
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $settings = $editor->getSettings();
+    $original_toolbar = $settings['toolbar'];
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $editor->setSettings($settings);
     $editor->save();
     $file = array();
     $file['b'] = 'core/modules/ckeditor/tests/modules/js/llama_button.js';
@@ -114,13 +116,15 @@ function testEnabledPlugins() {
     $expected = $enabled_plugins + array('llama_button' => $file['b'], 'llama_contextual_and_button' => $file['cb']);
     $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The LlamaButton and LlamaContextualAndButton plugins are enabled.');
     $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LlamaButton and LlamaContextualAndButton plugins are enabled.');
-    $editor->settings['toolbar'] = $original_toolbar;
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
+    $settings['toolbar'] = $original_toolbar;
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
+    $editor->setSettings($settings);
     $editor->save();
     $expected = $enabled_plugins + array('llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb']);
     $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The  LLamaContextual and LlamaContextualAndButton plugins are enabled.');
     $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LlamaContextual and LlamaContextualAndButton plugins are enabled.');
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $editor->setSettings($settings);
     $editor->save();
     $expected = $enabled_plugins + array('llama_button' => $file['b'], 'llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb']);
     $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The LlamaButton, LlamaContextual and LlamaContextualAndButton plugins are enabled.');
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorTest.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorTest.php
index d094731..955f072 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorTest.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Tests/CKEditorTest.php
@@ -109,8 +109,10 @@ function testGetJSSettings() {
     $this->container->get('plugin.manager.editor')->clearCachedDefinitions();
     $this->ckeditor = $this->container->get('plugin.manager.editor')->createInstance('ckeditor');
     $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Format';
+    $settings = $editor->getSettings();
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Format';
+    $editor->setSettings($settings);
     $editor->save();
     $expected_config['toolbar'][0]['items'][] = 'Strike';
     $expected_config['toolbar'][0]['items'][] = 'Format';
@@ -210,7 +212,9 @@ function testBuildToolbarJSSetting() {
     $this->assertIdentical($expected, $this->ckeditor->buildToolbarJSSetting($editor), '"toolbar" configuration part of JS settings built correctly for default toolbar.');
 
     // Customize the configuration.
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
+    $settings = $editor->getSettings();
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
+    $editor->setSettings($settings);
     $editor->save();
     $expected[0]['items'][] = 'Strike';
     $this->assertIdentical($expected, $this->ckeditor->buildToolbarJSSetting($editor), '"toolbar" configuration part of JS settings built correctly for customized toolbar.');
@@ -219,8 +223,9 @@ function testBuildToolbarJSSetting() {
     $this->enableModules(array('ckeditor_test'));
     $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
     // Override the label of a toolbar component.
-    $editor->settings['toolbar']['rows'][0][0]['name'] = 'JunkScience';
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $settings['toolbar']['rows'][0][0]['name'] = 'JunkScience';
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $editor->setSettings($settings);
     $editor->save();
     $expected[0]['name'] = 'JunkScience';
     $expected[0]['items'][] = 'Llama';
@@ -258,7 +263,9 @@ function testInternalGetConfig() {
     $this->assertIdentical($expected, $internal_plugin->getConfig($editor), '"Internal" plugin configuration built correctly for default toolbar.');
 
     // Format dropdown/button enabled: new setting should be present.
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Format';
+    $settings = $editor->getSettings();
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Format';
+    $editor->setSettings($settings);
     $expected['format_tags'] = 'p;h4;h5;h6';
     $this->assertIdentical($expected, $internal_plugin->getConfig($editor), '"Internal" plugin configuration built correctly for customized toolbar.');
   }
@@ -271,23 +278,28 @@ function testStylesComboGetConfig() {
     $stylescombo_plugin = $this->container->get('plugin.manager.ckeditor.plugin')->createInstance('stylescombo');
 
     // Styles dropdown/button enabled: new setting should be present.
-    $editor->settings['toolbar']['rows'][0][0]['items'][] = 'Styles';
-    $editor->settings['plugins']['stylescombo']['styles'] = '';
+    $settings = $editor->getSettings();
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Styles';
+    $settings['plugins']['stylescombo']['styles'] = '';
+    $editor->setSettings($settings);
     $editor->save();
     $expected['stylesSet'] = array();
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
 
     // Configure the optional "styles" setting in odd ways that shouldn't affect
     // the end result.
-    $editor->settings['plugins']['stylescombo']['styles'] = "   \n";
+    $settings['plugins']['stylescombo']['styles'] = "   \n";
+    $editor->setSettings($settings);
     $editor->save();
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor));
-    $editor->settings['plugins']['stylescombo']['styles'] = "\r\n  \n  \r  \n ";
+    $settings['plugins']['stylescombo']['styles'] = "\r\n  \n  \r  \n ";
+    $editor->setSettings($settings);
     $editor->save();
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
 
     // Now configure it properly, the end result should change.
-    $editor->settings['plugins']['stylescombo']['styles'] = "h1.title|Title\np.mAgical.Callout|Callout";
+    $settings['plugins']['stylescombo']['styles'] = "h1.title|Title\np.mAgical.Callout|Callout";
+    $editor->setSettings($settings);
     $editor->save();
     $expected['stylesSet'] = array(
       array('name' => 'Title', 'element' => 'h1', 'attributes' => array('class' => 'title')),
@@ -297,18 +309,21 @@ function testStylesComboGetConfig() {
 
     // Same configuration, but now interspersed with nonsense. Should yield the
     // same result.
-    $editor->settings['plugins']['stylescombo']['styles'] = "  h1 .title   |  Title \r \n\r  \np.mAgical  .Callout|Callout\r";
+    $settings['plugins']['stylescombo']['styles'] = "  h1 .title   |  Title \r \n\r  \np.mAgical  .Callout|Callout\r";
+    $editor->setSettings($settings);
     $editor->save();
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
 
     // Slightly different configuration: class names are optional.
-    $editor->settings['plugins']['stylescombo']['styles'] = "      h1 |  Title ";
+    $settings['plugins']['stylescombo']['styles'] = "      h1 |  Title ";
+    $editor->setSettings($settings);
     $editor->save();
     $expected['stylesSet'] = array(array('name' => 'Title', 'element' => 'h1'));
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
 
     // Invalid syntax should cause stylesSet to be set to FALSE.
-    $editor->settings['plugins']['stylescombo']['styles'] = "h1";
+    $settings['plugins']['stylescombo']['styles'] = "h1";
+    $editor->setSettings($settings);
     $editor->save();
     $expected['stylesSet'] = FALSE;
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
diff --git a/core/modules/ckeditor/tests/modules/lib/Drupal/ckeditor_test/Plugin/CKEditorPlugin/LlamaContextual.php b/core/modules/ckeditor/tests/modules/lib/Drupal/ckeditor_test/Plugin/CKEditorPlugin/LlamaContextual.php
index dcb60a8..16bb68a 100644
--- a/core/modules/ckeditor/tests/modules/lib/Drupal/ckeditor_test/Plugin/CKEditorPlugin/LlamaContextual.php
+++ b/core/modules/ckeditor/tests/modules/lib/Drupal/ckeditor_test/Plugin/CKEditorPlugin/LlamaContextual.php
@@ -26,7 +26,8 @@ class LlamaContextual extends Llama implements CKEditorPluginContextualInterface
    */
   function isEnabled(Editor $editor) {
     // Automatically enable this plugin if the Underline button is enabled.
-    foreach ($editor->settings['toolbar']['rows'] as $row) {
+    $settings = $editor->getSettings();
+    foreach ($settings['toolbar']['rows'] as $row) {
       foreach ($row as $group) {
         if (in_array('Strike', $group['items'])) {
           return TRUE;
diff --git a/core/modules/ckeditor/tests/modules/lib/Drupal/ckeditor_test/Plugin/CKEditorPlugin/LlamaContextualAndButton.php b/core/modules/ckeditor/tests/modules/lib/Drupal/ckeditor_test/Plugin/CKEditorPlugin/LlamaContextualAndButton.php
index c2ab8c5..171e3b3 100644
--- a/core/modules/ckeditor/tests/modules/lib/Drupal/ckeditor_test/Plugin/CKEditorPlugin/LlamaContextualAndButton.php
+++ b/core/modules/ckeditor/tests/modules/lib/Drupal/ckeditor_test/Plugin/CKEditorPlugin/LlamaContextualAndButton.php
@@ -29,7 +29,8 @@ class LlamaContextualAndButton extends Llama implements CKEditorPluginContextual
    */
   function isEnabled(Editor $editor) {
     // Automatically enable this plugin if the Strike button is enabled.
-    foreach ($editor->settings['toolbar']['rows'] as $row) {
+    $settings = $editor->getSettings();
+    foreach ($settings['toolbar']['rows'] as $row) {
       foreach ($row as $group) {
         if (in_array('Strike', $group['items'])) {
           return TRUE;
@@ -63,8 +64,9 @@ function getFile() {
   function settingsForm(array $form, array &$form_state, Editor $editor) {
     // Defaults.
     $config = array('ultra_llama_mode' => FALSE);
-    if (isset($editor->settings['plugins']['llama_contextual_and_button'])) {
-      $config = $editor->settings['plugins']['llama_contextual_and_button'];
+    $settings = $editor->getSettings();
+    if (isset($settings['plugins']['llama_contextual_and_button'])) {
+      $config = $settings['plugins']['llama_contextual_and_button'];
     }
 
     $form['ultra_llama_mode'] = array(
diff --git a/core/modules/editor/editor.admin.inc b/core/modules/editor/editor.admin.inc
index a29924b..8ed24b8 100644
--- a/core/modules/editor/editor.admin.inc
+++ b/core/modules/editor/editor.admin.inc
@@ -27,8 +27,8 @@
  */
 function editor_image_upload_settings_form(Editor $editor) {
   // Defaults.
-  $editor->image_upload = isset($editor->image_upload) ? $editor->image_upload : array();
-  $editor->image_upload += array(
+  $image_upload = $editor->getImageUploadSettings();
+  $image_upload += array(
     'status' => FALSE,
     'scheme' => file_default_scheme(),
     'directory' => 'inline-images',
@@ -39,7 +39,7 @@ function editor_image_upload_settings_form(Editor $editor) {
   $form['status'] = array(
     '#type' => 'checkbox',
     '#title' => t('Enable image uploads'),
-    '#default_value' => $editor->image_upload['status'],
+    '#default_value' => $image_upload['status'],
     '#attributes' => array(
       'data-editor-image-upload' => 'status',
     ),
@@ -60,7 +60,7 @@ function editor_image_upload_settings_form(Editor $editor) {
     $form['scheme'] = array(
       '#type' => 'radios',
       '#title' => t('File storage'),
-      '#default_value' => $editor->image_upload['scheme'],
+      '#default_value' => $image_upload['scheme'],
       '#options' => $options,
       '#states' => $show_if_image_uploads_enabled,
       '#access' => count($options) > 1,
@@ -75,7 +75,7 @@ function editor_image_upload_settings_form(Editor $editor) {
 
   $form['directory'] = array(
     '#type' => 'textfield',
-    '#default_value' => $editor->image_upload['directory'],
+    '#default_value' => $image_upload['directory'],
     '#title' => t('Upload directory'),
     '#description' => t("A directory relative to Drupal's files directory where uploaded images will be stored."),
     '#states' => $show_if_image_uploads_enabled,
@@ -84,7 +84,7 @@ function editor_image_upload_settings_form(Editor $editor) {
   $default_max_size = format_size(file_upload_max_size());
   $form['max_size'] = array(
     '#type' => 'textfield',
-    '#default_value' => $editor->image_upload['max_size'],
+    '#default_value' => $image_upload['max_size'],
     '#title' => t('Maximum file size'),
     '#description' => t('If this is left empty, then the file size will be limited by the PHP maximum upload size of @size.', array('@size' => $default_max_size)),
     '#maxlength' => 20,
@@ -105,7 +105,7 @@ function editor_image_upload_settings_form(Editor $editor) {
     '#title' => t('Width'),
     '#title_display' => 'invisible',
     '#type' => 'number',
-    '#default_value' => (empty($editor->image_upload['max_dimensions']['width'])) ? '' : $editor->image_upload['max_dimensions']['width'],
+    '#default_value' => (empty($image_upload['max_dimensions']['width'])) ? '' : $image_upload['max_dimensions']['width'],
     '#size' => 8,
     '#maxlength' => 8,
     '#min' => 1,
@@ -118,7 +118,7 @@ function editor_image_upload_settings_form(Editor $editor) {
     '#title' => t('Height'),
     '#title_display' => 'invisible',
     '#type' => 'number',
-    '#default_value' => (empty($editor->image_upload['max_dimensions']['height'])) ? '' : $editor->image_upload['max_dimensions']['height'],
+    '#default_value' => (empty($image_upload['max_dimensions']['height'])) ? '' : $image_upload['max_dimensions']['height'],
     '#size' => 8,
     '#maxlength' => 8,
     '#min' => 1,
diff --git a/core/modules/editor/editor.module b/core/modules/editor/editor.module
index abfc81f..717355e 100644
--- a/core/modules/editor/editor.module
+++ b/core/modules/editor/editor.module
@@ -79,7 +79,7 @@ function editor_form_filter_admin_overview_alter(&$form, $form_state) {
   $editors = \Drupal::service('plugin.manager.editor')->getDefinitions();
   foreach (Element::children($form['formats']) as $format_id) {
     $editor = editor_load($format_id);
-    $editor_name = ($editor && isset($editors[$editor->editor])) ? $editors[$editor->editor]['label'] : drupal_placeholder('—');
+    $editor_name = ($editor && isset($editors[$editor->getEditor()])) ? $editors[$editor->getEditor()]['label'] : drupal_placeholder('—');
     $editor_column['editor'] = array('#markup' => $editor_name);
     $position = array_search('name', array_keys($form['formats'][$format_id])) + 1;
     $start = array_splice($form['formats'][$format_id], 0, $position, $editor_column);
@@ -110,7 +110,7 @@ function editor_form_filter_format_form_alter(&$form, &$form_state) {
     '#title' => t('Text editor'),
     '#options' => $editor_options,
     '#empty_option' => t('None'),
-    '#default_value' => $editor ? $editor->editor : '',
+    '#default_value' => $editor ? $editor->getEditor() : '',
     '#ajax' => array(
       'trigger_as' => array('name' => 'editor_configure'),
       'callback' => 'editor_form_filter_admin_form_ajax',
@@ -152,7 +152,7 @@ function editor_form_filter_format_form_alter(&$form, &$form_state) {
 
   // Add editor-specific validation and submit handlers.
   if ($editor) {
-    $plugin = $manager->createInstance($editor->editor);
+    $plugin = $manager->createInstance($editor->getEditor());
     $settings_form = array();
     $settings_form['#element_validate'][] = array($plugin, 'settingsFormValidate');
     $form['editor']['settings']['subform'] = $plugin->settingsForm($settings_form, $form_state, $editor);
@@ -173,7 +173,7 @@ function editor_form_filter_admin_format_editor_configure($form, &$form_state) {
     if ($form_state['values']['editor']['editor'] === '') {
       $form_state['editor'] = FALSE;
     }
-    elseif (empty($editor) || $form_state['values']['editor']['editor'] !== $editor->editor) {
+    elseif (empty($editor) || $form_state['values']['editor']['editor'] !== $editor->getEditor()) {
       $editor = entity_create('editor', array(
         'format' => $form_state['controller']->getEntity()->id(),
         'editor' => $form_state['values']['editor']['editor'],
@@ -216,7 +216,7 @@ function editor_form_filter_admin_format_submit($form, &$form_state) {
   // Delete the existing editor if disabling or switching between editors.
   $format_id = $form_state['controller']->getEntity()->id();
   $original_editor = editor_load($format_id);
-  if ($original_editor && $original_editor->editor != $form_state['values']['editor']) {
+  if ($original_editor && $original_editor->getEditor() != $form_state['values']['editor']) {
     $original_editor->delete();
   }
 
@@ -224,8 +224,8 @@ function editor_form_filter_admin_format_submit($form, &$form_state) {
   if (!empty($form_state['editor'])) {
     // Ensure the text format is set: when creating a new text format, this
     // would equal the empty string.
-    $form_state['editor']->format = $format_id;
-    $form_state['editor']->settings = $form_state['values']['editor']['settings'];
+    $form_state['editor']->set('format', $format_id);
+    $form_state['editor']->setSettings($form_state['values']['editor']['settings']);
     $form_state['editor']->save();
   }
 }
@@ -359,7 +359,7 @@ function editor_filter_xss($html, FilterFormatInterface $format, FilterFormatInt
 
   // If the text editor associated with this text format guarantees security,
   // then we also don't need text editor XSS filtering.
-  $definition = \Drupal::service('plugin.manager.editor')->getDefinition($editor->editor);
+  $definition = \Drupal::service('plugin.manager.editor')->getDefinition($editor->getEditor());
   if ($definition['is_xss_safe'] === TRUE) {
     return FALSE;
   }
diff --git a/core/modules/editor/lib/Drupal/editor/EditorInterface.php b/core/modules/editor/lib/Drupal/editor/EditorInterface.php
index 2fab152..7847011 100644
--- a/core/modules/editor/lib/Drupal/editor/EditorInterface.php
+++ b/core/modules/editor/lib/Drupal/editor/EditorInterface.php
@@ -21,4 +21,48 @@
    */
   public function getFilterFormat();
 
+  /**
+   * Returns the associated text editor plugin ID.
+   *
+   * @return string
+   *   The text editor plugin ID.
+   */
+  public function getEditor();
+
+  /**
+   * Returns the text editor plugin-specific settings.
+   *
+   * @return array
+   *   A structured array containing all text editor settings.
+   */
+  public function getSettings();
+
+  /**
+   * Sets the text editor plugin-specific settings.
+   *
+   * @param array $settings
+   *   The structured array containing all text editor settings.
+   *
+   * @return $this
+   */
+  public function setSettings(array $settings);
+
+  /**
+   * Returns the image upload settings.
+   *
+   * @return array
+   *   A structured array containing image upload settings.
+   */
+  public function getImageUploadSettings();
+
+  /**
+   * Sets the image upload settings.
+   *
+   * @param array $image_upload
+   *   The structured array containing image upload settings.
+   *
+   * @return $this
+   */
+  public function setImageUploadSettings(array $image_upload);
+
 }
diff --git a/core/modules/editor/lib/Drupal/editor/Entity/Editor.php b/core/modules/editor/lib/Drupal/editor/Entity/Editor.php
index 82b4ff7..8378102 100644
--- a/core/modules/editor/lib/Drupal/editor/Entity/Editor.php
+++ b/core/modules/editor/lib/Drupal/editor/Entity/Editor.php
@@ -28,29 +28,31 @@ class Editor extends ConfigEntityBase implements EditorInterface {
    * is associated.
    *
    * @var string
+   *
+   * @see getFilterFormat()
    */
-  public $format;
+  protected $format;
 
   /**
    * The name (plugin ID) of the text editor.
    *
    * @var string
    */
-  public $editor;
+  protected $editor;
 
   /**
-   * The array of text editor plugin-specific settings for the text editor.
+   * The structured array of text editor plugin-specific settings.
    *
    * @var array
    */
-  public $settings = array();
+  protected $settings = array();
 
   /**
-   * The array of image upload settings for the text editor.
+   * The structured array of image upload settings.
    *
    * @var array
    */
-  public $image_upload = array();
+  protected $image_upload = array();
 
   /**
    * The filter format this text editor is associated with.
@@ -123,4 +125,58 @@ protected function editorPluginManager() {
     return $this->editorPluginManager;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getEditor() {
+    return $this->editor;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getSettings() {
+    return $this->settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setSettings(array $settings) {
+    $this->settings = $settings;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getImageUploadSettings() {
+    return $this->image_upload;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setImageUploadSettings(array $image_upload_settings) {
+    $this->image_upload = $image_upload_settings;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function toArray() {
+    $properties = parent::toArray();
+    $names = array(
+      'format',
+      'editor',
+      'settings',
+      'image_upload',
+    );
+    foreach ($names as $name) {
+      $properties[$name] = $this->get($name);
+    }
+    return $properties;
+  }
+
 }
diff --git a/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php b/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php
index 9090e9e..f350bd2 100644
--- a/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php
+++ b/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php
@@ -48,13 +48,14 @@ public function buildForm(array $form, array &$form_state, FilterFormat $filter_
     $editor = editor_load($filter_format->format);
 
     // Construct strings to use in the upload validators.
-    if (!empty($editor->image_upload['dimensions'])) {
-      $max_dimensions = $editor->image_upload['dimensions']['max_width'] . 'x' . $editor->image_upload['dimensions']['max_height'];
+    $image_upload = $editor->getImageUploadSettings();
+    if (!empty($image_upload['dimensions'])) {
+      $max_dimensions = $image_upload['dimensions']['max_width'] . 'x' . $image_upload['dimensions']['max_height'];
     }
     else {
       $max_dimensions = 0;
     }
-    $max_filesize = min(parse_size($editor->image_upload['max_size']), file_upload_max_size());
+    $max_filesize = min(parse_size($image_upload['max_size']), file_upload_max_size());
 
     $existing_file = isset($image_element['data-editor-file-uuid']) ? entity_load_by_uuid('file', $image_element['data-editor-file-uuid']) : NULL;
     $fid = $existing_file ? $existing_file->id() : NULL;
@@ -62,7 +63,7 @@ public function buildForm(array $form, array &$form_state, FilterFormat $filter_
     $form['fid'] = array(
       '#title' => $this->t('Image'),
       '#type' => 'managed_file',
-      '#upload_location' => $editor->image_upload['scheme'] . '://' .$editor->image_upload['directory'],
+      '#upload_location' => $image_upload['scheme'] . '://' . $image_upload['directory'],
       '#default_value' => $fid ? array($fid) : NULL,
       '#upload_validators' => array(
         'file_validate_extensions' => array('gif png jpg jpeg'),
@@ -82,7 +83,7 @@ public function buildForm(array $form, array &$form_state, FilterFormat $filter_
 
     // If the editor has image uploads enabled, show a managed_file form item,
     // otherwise show a (file URL) text form item.
-    if ($editor->image_upload['status']) {
+    if ($image_upload['status']) {
       $form['attributes']['src']['#access'] = FALSE;
       $form['attributes']['src']['#required'] = FALSE;
     }
diff --git a/core/modules/editor/lib/Drupal/editor/Plugin/EditorManager.php b/core/modules/editor/lib/Drupal/editor/Plugin/EditorManager.php
index 85aa79d..adf16e5 100644
--- a/core/modules/editor/lib/Drupal/editor/Plugin/EditorManager.php
+++ b/core/modules/editor/lib/Drupal/editor/Plugin/EditorManager.php
@@ -71,7 +71,7 @@ public function getAttachments(array $format_ids) {
         continue;
       }
 
-      $plugin = $this->createInstance($editor->editor);
+      $plugin = $this->createInstance($editor->getEditor());
       $plugin_definition = $plugin->getPluginDefinition();
 
       // Libraries.
@@ -80,7 +80,7 @@ public function getAttachments(array $format_ids) {
       // Format-specific JavaScript settings.
       $settings['editor']['formats'][$format_id] = array(
         'format' => $format_id,
-        'editor' => $editor->editor,
+        'editor' => $editor->getEditor(),
         'editorSettings' => $plugin->getJSSettings($editor),
         'editorSupportsContentFiltering' => $plugin_definition['supports_content_filtering'],
         'isXssSafe' => $plugin_definition['is_xss_safe'],
diff --git a/core/modules/editor/lib/Drupal/editor/Plugin/InPlaceEditor/Editor.php b/core/modules/editor/lib/Drupal/editor/Plugin/InPlaceEditor/Editor.php
index e378888..76b4ac4 100644
--- a/core/modules/editor/lib/Drupal/editor/Plugin/InPlaceEditor/Editor.php
+++ b/core/modules/editor/lib/Drupal/editor/Plugin/InPlaceEditor/Editor.php
@@ -37,7 +37,7 @@ public function isCompatible(FieldItemListInterface $items) {
     // associated editor and that editor supports inline editing.
     elseif ($field_definition->getSetting('text_processing')) {
       if ($editor = editor_load($items[0]->format)) {
-        $definition = \Drupal::service('plugin.manager.editor')->getDefinition($editor->editor);
+        $definition = \Drupal::service('plugin.manager.editor')->getDefinition($editor->getEditor());
         if ($definition['supports_inline_editing'] === TRUE) {
           return TRUE;
         }
@@ -79,7 +79,8 @@ public function getAttachments() {
     $formats = array();
     foreach ($user_format_ids as $format_id) {
       $editor = editor_load($format_id);
-      if ($editor && isset($definitions[$editor->editor]) && isset($definitions[$editor->editor]['supports_inline_editing']) && $definitions[$editor->editor]['supports_inline_editing'] === TRUE) {
+      $editor_id = $editor->getEditor();
+      if ($editor && isset($definitions[$editor_id]) && isset($definitions[$editor_id]['supports_inline_editing']) && $definitions[$editor_id]['supports_inline_editing'] === TRUE) {
         $formats[] = $format_id;
       }
     }
diff --git a/core/modules/editor/lib/Drupal/editor/Tests/EditorAdminTest.php b/core/modules/editor/lib/Drupal/editor/Tests/EditorAdminTest.php
index 177e050..8d95a8b 100644
--- a/core/modules/editor/lib/Drupal/editor/Tests/EditorAdminTest.php
+++ b/core/modules/editor/lib/Drupal/editor/Tests/EditorAdminTest.php
@@ -150,11 +150,12 @@ protected function selectUnicornEditor() {
    */
   protected function verifyUnicornEditorConfiguration($format_id, $foo = 'bar') {
     $editor = editor_load($format_id);
-    $this->assertIdentical($editor->editor, 'unicorn', 'The text editor is configured correctly.');
-    $this->assertIdentical($editor->settings['foo'], $foo, 'The text editor settings are stored correctly.');
-    $this->assertIdentical($editor->settings['ponies too'], true, 'The text editor defaults are retrieved correctly.');
-    $this->assertIdentical($editor->settings['rainbows'], true, 'The text editor defaults added by hook_editor_settings_defaults() are retrieved correctly.');
-    $this->assertIdentical($editor->settings['sparkles'], false, 'The text editor defaults modified by hook_editor_settings_defaults_alter() are retrieved correctly.');
+    $settings = $editor->getSettings();
+    $this->assertIdentical($editor->getEditor(), 'unicorn', 'The text editor is configured correctly.');
+    $this->assertIdentical($settings['foo'], $foo, 'The text editor settings are stored correctly.');
+    $this->assertIdentical($settings['ponies too'], true, 'The text editor defaults are retrieved correctly.');
+    $this->assertIdentical($settings['rainbows'], true, 'The text editor defaults added by hook_editor_settings_defaults() are retrieved correctly.');
+    $this->assertIdentical($settings['sparkles'], false, 'The text editor defaults modified by hook_editor_settings_defaults_alter() are retrieved correctly.');
     $this->drupalGet('admin/config/content/formats/manage/'. $format_id);
     $select = $this->xpath('//select[@name="editor[editor]"]');
     $select_is_disabled = $this->xpath('//select[@name="editor[editor]" and @disabled="disabled"]');
diff --git a/core/modules/editor/tests/modules/lib/Drupal/editor_test/Plugin/Editor/UnicornEditor.php b/core/modules/editor/tests/modules/lib/Drupal/editor_test/Plugin/Editor/UnicornEditor.php
index d5234df..5015759 100644
--- a/core/modules/editor/tests/modules/lib/Drupal/editor_test/Plugin/Editor/UnicornEditor.php
+++ b/core/modules/editor/tests/modules/lib/Drupal/editor_test/Plugin/Editor/UnicornEditor.php
@@ -46,11 +46,12 @@ function settingsForm(array $form, array &$form_state, EditorEntity $editor) {
    * {@inheritdoc}
    */
   function getJSSettings(EditorEntity $editor) {
-    $settings = array();
-    if ($editor->settings['ponies too']) {
-      $settings['ponyModeEnabled'] = TRUE;
+    $js_settings = array();
+    $settings = $editor->getSettings();
+    if ($settings['ponies too']) {
+      $js_settings['ponyModeEnabled'] = TRUE;
     }
-    return $settings;
+    return $js_settings;
   }
 
   /**