diff --git a/core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php b/core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php
index fc4a4c4..067f54d 100644
--- a/core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php
+++ b/core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php
@@ -67,14 +67,6 @@ class FieldFormatter extends Plugin {
   public $field_types = array();
 
   /**
-   * An array whose keys are the names of the settings available to the
-   * formatter type, and whose values are the default values for those settings.
-   *
-   * @var array
-   */
-  public $settings = array();
-
-  /**
    * An integer to determine the weight of this formatter relative to other
    * formatter in the Field UI when selecting a formatter for a given field
    * instance.
diff --git a/core/lib/Drupal/Core/Field/FormatterPluginManager.php b/core/lib/Drupal/Core/Field/FormatterPluginManager.php
index d81ff57..ba72ae1 100644
--- a/core/lib/Drupal/Core/Field/FormatterPluginManager.php
+++ b/core/lib/Drupal/Core/Field/FormatterPluginManager.php
@@ -198,8 +198,12 @@ public function getOptions($field_type = NULL) {
    *   definition, or an empty array if type or settings are undefined.
    */
   public function getDefaultSettings($type) {
-    $info = $this->getDefinition($type);
-    return isset($info['settings']) ? $info['settings'] : array();
+    $plugin_definition = $this->getDefinition($type);
+    if (!empty($plugin_definition['class'])) {
+      $plugin_class = DefaultFactory::getPluginClass($type, $plugin_definition);
+      return $plugin_class::settings();
+    }
+    return array();
   }
 
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringWidget.php
index 8d13286..35ba2e0 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringWidget.php
@@ -20,10 +20,6 @@
  *     "string",
  *     "email"
  *   },
- *   settings = {
- *     "size" = "60",
- *     "placeholder" = ""
- *   }
  * )
  */
 class StringWidget extends WidgetBase {
@@ -31,6 +27,16 @@ class StringWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['size'] = '60';
+    $settings['placeholder'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['size'] = array(
       '#type' => 'number',
diff --git a/core/lib/Drupal/Core/Field/PluginSettingsBase.php b/core/lib/Drupal/Core/Field/PluginSettingsBase.php
index 895563a..c35d03b 100644
--- a/core/lib/Drupal/Core/Field/PluginSettingsBase.php
+++ b/core/lib/Drupal/Core/Field/PluginSettingsBase.php
@@ -31,7 +31,21 @@
   protected $defaultSettingsMerged = FALSE;
 
   /**
-   * Implements Drupal\field\Plugin\PluginSettingsInterface::getSettings().
+   * {@inheritdoc}
+   */
+  public static function settings() {
+    return array();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function hasSettings() {
+    return !empty($this->settings);
+  }
+
+  /**
+   * {@inheritdoc}
    */
   public function getSettings() {
     // Merge defaults before returning the array.
@@ -42,7 +56,7 @@ public function getSettings() {
   }
 
   /**
-   * Implements Drupal\field\Plugin\PluginSettingsInterface::getSetting().
+   * {@inheritdoc}
    */
   public function getSetting($key) {
     // Merge defaults if we have no value for the key.
@@ -56,20 +70,12 @@ public function getSetting($key) {
    * Merges default settings values into $settings.
    */
   protected function mergeDefaults() {
-    $this->settings += $this->getDefaultSettings();
+    $this->settings += static::settings();
     $this->defaultSettingsMerged = TRUE;
   }
 
   /**
-   * Implements Drupal\field\Plugin\PluginSettingsInterface::getDefaultSettings().
-   */
-  public function getDefaultSettings() {
-    $definition = $this->getPluginDefinition();
-    return $definition['settings'];
-  }
-
-  /**
-   * Implements Drupal\field\Plugin\PluginSettingsInterface::setSettings().
+   * {@inheritdoc}
    */
   public function setSettings(array $settings) {
     $this->settings = $settings;
@@ -78,7 +84,7 @@ public function setSettings(array $settings) {
   }
 
   /**
-   * Implements Drupal\field\Plugin\PluginSettingsInterface::setSetting().
+   * {@inheritdoc}
    */
   public function setSetting($key, $value) {
     $this->settings[$key] = $value;
diff --git a/core/lib/Drupal/Core/Field/PluginSettingsInterface.php b/core/lib/Drupal/Core/Field/PluginSettingsInterface.php
index d7ffc47..8b588ec 100644
--- a/core/lib/Drupal/Core/Field/PluginSettingsInterface.php
+++ b/core/lib/Drupal/Core/Field/PluginSettingsInterface.php
@@ -15,6 +15,22 @@
 interface PluginSettingsInterface extends PluginInspectionInterface {
 
   /**
+   * Defines the default settings for this plugin.
+   *
+   * @return array
+   *   A list of default settings, keyed by the setting name.
+   */
+  public static function settings();
+
+  /**
+   * Returns whether this plugin defines settings.
+   *
+   * @return bool
+   *   TRUE if this plugin defines settings.
+   */
+  public function hasSettings();
+
+  /**
    * Returns the array of settings, including defaults for missing settings.
    *
    * @return array
@@ -34,21 +50,13 @@ public function getSettings();
   public function getSetting($key);
 
   /**
-   * Returns the default settings for the plugin.
-   *
-   * @return array
-   *   The array of default setting values, keyed by setting names.
-   */
-  public function getDefaultSettings();
-
-  /**
    * Sets the settings for the plugin.
    *
    * @param array $settings
    *   The array of settings, keyed by setting names. Missing settings will be
    *   assigned their default values.
    *
-   * @return \Drupal\field\Plugin\PluginSettingsInterface
+   * @return \Drupal\Core\Field\PluginSettingsInterface
    *   The plugin itself.
    */
   public function setSettings(array $settings);
@@ -61,7 +69,7 @@ public function setSettings(array $settings);
    * @param mixed $value
    *   The setting value.
    *
-   * @return \Drupal\field\Plugin\PluginSettingsInterface
+   * @return \Drupal\Core\Field\PluginSettingsInterface
    *   The plugin itself.
    */
   public function setSetting($key, $value);
diff --git a/core/lib/Drupal/Core/Field/WidgetPluginManager.php b/core/lib/Drupal/Core/Field/WidgetPluginManager.php
index 47fedb1..0fb3815 100644
--- a/core/lib/Drupal/Core/Field/WidgetPluginManager.php
+++ b/core/lib/Drupal/Core/Field/WidgetPluginManager.php
@@ -200,8 +200,13 @@ public function getOptions($field_type = NULL) {
    *   definition, or an empty array if type or settings are undefined.
    */
   public function getDefaultSettings($type) {
-    $info = $this->getDefinition($type);
-    return isset($info['settings']) ? $info['settings'] : array();
+    $plugin_definition = $this->getDefinition($type);
+    if (!empty($plugin_definition['class'])) {
+      $plugin_class = DefaultFactory::getPluginClass($type, $plugin_definition);
+      return $plugin_class::settings();
+    }
+
+    return array();
   }
 
 }
diff --git a/core/modules/comment/lib/Drupal/comment/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php b/core/modules/comment/lib/Drupal/comment/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
index bf4979b..8bf7ef4 100644
--- a/core/modules/comment/lib/Drupal/comment/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
+++ b/core/modules/comment/lib/Drupal/comment/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
@@ -29,15 +29,21 @@
  *   },
  *   edit = {
  *     "editor" = "disabled"
- *   },
- *   settings = {
- *     "pager_id" = 0
  *   }
  * )
  */
 class CommentDefaultFormatter extends FormatterBase implements ContainerFactoryPluginInterface {
 
   /**
+   * {@inheritdoc}
+   */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['pager_id'] = 0;
+    return $settings;
+  }
+
+  /**
    * The comment storage controller.
    *
    * @var \Drupal\comment\CommentStorageControllerInterface
diff --git a/core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php b/core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php
index 754ffc0..918e74f 100644
--- a/core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php
+++ b/core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php
@@ -24,15 +24,21 @@
  *   label = @Translation("Default"),
  *   field_types = {
  *     "datetime"
- *   },
- *   settings = {
- *     "format_type" = "medium",
  *   }
  * )
  */
 class DateTimeDefaultFormatter extends FormatterBase implements ContainerFactoryPluginInterface {
 
   /**
+   * {@inheritdoc}
+   */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['format_type'] = 'medium';
+    return $settings;
+  }
+
+  /**
    * The date service.
    *
    * @var \Drupal\Core\Datetime\Date
diff --git a/core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldWidget/DateTimeDatelistWidget.php b/core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldWidget/DateTimeDatelistWidget.php
index cbae23c..57f108a 100644
--- a/core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldWidget/DateTimeDatelistWidget.php
+++ b/core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldWidget/DateTimeDatelistWidget.php
@@ -18,11 +18,6 @@
  *   label = @Translation("Select list"),
  *   field_types = {
  *     "datetime"
- *   },
- *   settings = {
- *     "increment" = 15,
- *     "date_order" = "YMD",
- *     "time_type" = "24",
  *   }
  * )
  */
@@ -31,6 +26,17 @@ class DateTimeDatelistWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['increment'] = '15';
+    $settings['date_order'] = 'YMD';
+    $settings['time_type'] = '24';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $date_order = $this->getSetting('date_order');
     $time_type = $this->getSetting('time_type');
diff --git a/core/modules/email/lib/Drupal/email/Plugin/Field/FieldWidget/EmailDefaultWidget.php b/core/modules/email/lib/Drupal/email/Plugin/Field/FieldWidget/EmailDefaultWidget.php
index 62db527..0dc4322 100644
--- a/core/modules/email/lib/Drupal/email/Plugin/Field/FieldWidget/EmailDefaultWidget.php
+++ b/core/modules/email/lib/Drupal/email/Plugin/Field/FieldWidget/EmailDefaultWidget.php
@@ -18,9 +18,6 @@
  *   label = @Translation("E-mail"),
  *   field_types = {
  *     "email"
- *   },
- *   settings = {
- *     "placeholder" = ""
  *   }
  * )
  */
@@ -29,6 +26,15 @@ class EmailDefaultWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['placeholder'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['placeholder'] = array(
       '#type' => 'textfield',
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
index 40e3c39..522dc68 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
@@ -19,10 +19,6 @@
  *   description = @Translation("Display the referenced entities rendered by entity_view()."),
  *   field_types = {
  *     "entity_reference"
- *   },
- *   settings = {
- *     "view_mode" = "default",
- *     "link" = FALSE
  *   }
  * )
  */
@@ -31,6 +27,16 @@ class EntityReferenceEntityFormatter extends EntityReferenceFormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['view_mode'] = 'default';
+    $settings['link'] = FALSE;
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $view_modes = entity_get_view_modes($this->getFieldSetting('target_type'));
     $options = array('default' => t('Default'));
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
index ea13e17..b57c8ec 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
@@ -18,9 +18,6 @@
  *   description = @Translation("Display the label of the referenced entities."),
  *   field_types = {
  *     "entity_reference"
- *   },
- *   settings = {
- *     "link" = TRUE
  *   }
  * )
  */
@@ -29,6 +26,15 @@ class EntityReferenceLabelFormatter extends EntityReferenceFormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['link'] = TRUE;
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $elements['link'] = array(
       '#title' => t('Link label to the referenced entity'),
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldWidget/AutocompleteTagsWidget.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldWidget/AutocompleteTagsWidget.php
index 2367fa1..4f2bfb2 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldWidget/AutocompleteTagsWidget.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldWidget/AutocompleteTagsWidget.php
@@ -17,12 +17,6 @@
  *   field_types = {
  *     "entity_reference"
  *   },
- *   settings = {
- *     "match_operator" = "CONTAINS",
- *     "size" = 60,
- *     "autocomplete_type" = "tags",
- *     "placeholder" = ""
- *   },
  *   multiple_values = TRUE
  * )
  */
@@ -31,6 +25,18 @@ class AutocompleteTagsWidget extends AutocompleteWidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['match_operator'] = 'CONTAINS';
+    $settings['size'] = '60';
+    $settings['autocomplete_type'] = 'tags';
+    $settings['placeholder'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function elementValidate($element, &$form_state, $form) {
     $value = array();
     // If a value was entered into the autocomplete.
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldWidget/AutocompleteWidget.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldWidget/AutocompleteWidget.php
index 0898d68..bc91b1d 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldWidget/AutocompleteWidget.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Field/FieldWidget/AutocompleteWidget.php
@@ -23,17 +23,25 @@
  *   description = @Translation("An autocomplete text field."),
  *   field_types = {
  *     "entity_reference"
- *   },
- *   settings = {
- *     "match_operator" = "CONTAINS",
- *     "size" = 60,
- *     "autocomplete_type" = "single",
- *     "placeholder" = ""
  *   }
  * )
  */
 class AutocompleteWidget extends AutocompleteWidgetBase {
 
+  protected $usesOptions = TRUE;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['match_operator'] = 'CONTAINS';
+    $settings['size'] = '60';
+    $settings['autocomplete_type'] = 'tags';
+    $settings['placeholder'] = '';
+    return $settings;
+  }
+
   /**
    * {@inheritdoc}
    */
diff --git a/core/modules/field/field.api.php b/core/modules/field/field.api.php
index 92e9eb6..c433cdd 100644
--- a/core/modules/field/field.api.php
+++ b/core/modules/field/field.api.php
@@ -126,13 +126,6 @@ function hook_field_extra_fields_alter(&$info) {
  *   manager.
  */
 function hook_field_info_alter(&$info) {
-  // Add a setting to all field types.
-  foreach ($info as $field_type => $field_type_info) {
-    $info[$field_type]['settings'] += array(
-      'mymodule_additional_setting' => 'default value',
-    );
-  }
-
   // Change the default widget for fields of type 'foo'.
   if (isset($info['foo'])) {
     $info['foo']['default widget'] = 'mymodule_widget';
@@ -174,15 +167,10 @@ function hook_field_info_alter(&$info) {
  * Perform alterations on Field API widget types.
  *
  * @param array $info
- *   An array of informations on existing widget types, as collected by the
+ *   An array of information on existing widget types, as collected by the
  *   annotation discovery mechanism.
  */
 function hook_field_widget_info_alter(array &$info) {
-  // Add a setting to a widget type.
-  $info['text_textfield']['settings'] += array(
-    'mymodule_additional_setting' => 'default value',
-  );
-
   // Let a new field type re-use an existing widget.
   $info['options_select']['field_types'][] = 'my_field_type';
 }
@@ -274,15 +262,10 @@ function hook_field_widget_WIDGET_TYPE_form_alter(&$element, &$form_state, $cont
  * Perform alterations on Field API formatter types.
  *
  * @param array $info
- *   An array of informations on existing formatter types, as collected by the
+ *   An array of information on existing formatter types, as collected by the
  *   annotation discovery mechanism.
  */
 function hook_field_formatter_info_alter(array &$info) {
-  // Add a setting to a formatter type.
-  $info['text_default']['settings'] += array(
-    'mymodule_additional_setting' => 'default value',
-  );
-
   // Let a new field type re-use an existing formatter.
   $info['text_default']['field types'][] = 'my_field_type';
 }
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldDefaultFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldDefaultFormatter.php
index 97beb5c..193b101 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldDefaultFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldDefaultFormatter.php
@@ -20,9 +20,6 @@
  *   field_types = {
  *     "test_field"
  *   },
- *   settings = {
- *     "test_formatter_setting" = "dummy test string"
- *   },
  *   weight = 1
  * )
  */
@@ -31,6 +28,15 @@ class TestFieldDefaultFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['test_formatter_setting'] = 'dummy test string';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['test_formatter_setting'] = array(
       '#title' => t('Setting'),
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldEmptyFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldEmptyFormatter.php
index e624bf9..f5bd036 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldEmptyFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldEmptyFormatter.php
@@ -19,9 +19,6 @@
  *   field_types = {
  *     "test_field",
  *   },
- *   settings = {
- *     "test_empty_string" = "**EMPTY FIELD**"
- *   },
  *   weight = -5
  * )
  */
@@ -30,6 +27,15 @@ class TestFieldEmptyFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['test_empty_string'] = '**EMPTY FIELD**';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function viewElements(FieldItemListInterface $items) {
     $elements = array();
 
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldEmptySettingFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldEmptySettingFormatter.php
index fa4d9a9..3a7ff53 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldEmptySettingFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldEmptySettingFormatter.php
@@ -19,9 +19,6 @@
  *   field_types = {
  *     "test_field",
  *   },
- *   settings = {
- *     "field_empty_setting" = ""
- *   },
  *   weight = -1
  * )
  */
@@ -30,6 +27,15 @@ class TestFieldEmptySettingFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['field_empty_setting'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['field_empty_setting'] = array(
       '#title' => t('Setting'),
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldMultipleFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldMultipleFormatter.php
index 87d9553..f4fe8b8 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldMultipleFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldMultipleFormatter.php
@@ -20,9 +20,6 @@
  *   field_types = {
  *     "test_field"
  *   },
- *   settings = {
- *     "test_formatter_setting_multiple" = "dummy test string"
- *   },
  *   weight = 5
  * )
  */
@@ -31,6 +28,15 @@ class TestFieldMultipleFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['test_formatter_setting_multiple'] = 'dummy test string';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['test_formatter_setting_multiple'] = array(
       '#title' => t('Setting'),
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldPrepareViewFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldPrepareViewFormatter.php
index 85b97f1..8dd2b85 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldPrepareViewFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldFormatter/TestFieldPrepareViewFormatter.php
@@ -20,9 +20,6 @@
  *   field_types = {
  *     "test_field"
  *   },
- *   settings = {
- *     "test_formatter_setting_additional" = "dummy test string"
- *   },
  *   weight = 10
  * )
  */
@@ -31,6 +28,15 @@ class TestFieldPrepareViewFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['test_formatter_setting_additional'] = 'dummy test string';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['test_formatter_setting_additional'] = array(
       '#title' => t('Setting'),
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidget.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidget.php
index ae80042..6034592 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidget.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidget.php
@@ -21,9 +21,6 @@
  *      "test_field",
  *      "hidden_test_field"
  *   },
- *   settings = {
- *     "test_widget_setting" = "dummy test string"
- *   },
  *   weight = -10
  * )
  */
@@ -32,6 +29,15 @@ class TestFieldWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['test_widget_setting'] = 'dummy test string';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['test_widget_setting'] = array(
       '#type' => 'textfield',
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
index a16eb3f..0ea709b 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
@@ -22,9 +22,6 @@
  * @FieldWidget(
  *   id = "test_field_widget_multiple",
  *   label = @Translation("Test widget - multiple"),
- *   settings = {
- *     "test_widget_setting_multiple" = "dummy test string"
- *   },
  *   multiple_values = TRUE,
  *   weight = 10
  * )
@@ -34,6 +31,15 @@ class TestFieldWidgetMultiple extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['test_widget_setting_multiple'] = 'dummy test string';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['test_widget_setting_multiple'] = array(
       '#type' => 'textfield',
diff --git a/core/modules/field_ui/lib/Drupal/field_ui/DisplayOverviewBase.php b/core/modules/field_ui/lib/Drupal/field_ui/DisplayOverviewBase.php
index 495a6e2..3067ced 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/DisplayOverviewBase.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/DisplayOverviewBase.php
@@ -399,8 +399,7 @@ protected function buildFieldRow(FieldDefinitionInterface $field_definition, Ent
         }
 
         // Check selected plugin settings to display edit link or not.
-        $plugin_definition = $plugin->getPluginDefinition();
-        if ($plugin_definition['settings']) {
+        if ($plugin->hasSettings()) {
           $field_row['settings_edit'] = $base_button + array(
             '#type' => 'image_button',
             '#name' => $field_name . '_settings_edit',
diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageDisplayTest.php b/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageDisplayTest.php
index 133b578..e189c2b 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageDisplayTest.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageDisplayTest.php
@@ -225,10 +225,11 @@ function testViewModeCustom() {
     $node = $this->drupalCreateNode($settings);
 
     // Gather expected output values with the various formatters.
-    $formatters = \Drupal::service('plugin.manager.field.formatter')->getDefinitions();
+    $field_test_default_settings = \Drupal::service('plugin.manager.field.formatter')->getDefaultSettings('field_test_default');
+    $field_test_with_prepare_view_settings = \Drupal::service('plugin.manager.field.formatter')->getDefaultSettings('field_test_with_prepare_view');
     $output = array(
-      'field_test_default' => $formatters['field_test_default']['settings']['test_formatter_setting'] . '|' . $value,
-      'field_test_with_prepare_view' => $formatters['field_test_with_prepare_view']['settings']['test_formatter_setting_additional'] . '|' . $value. '|' . ($value + 1),
+      'field_test_default' => $field_test_default_settings['test_formatter_setting'] . '|' . $value,
+      'field_test_with_prepare_view' => $field_test_with_prepare_view_settings['test_formatter_setting_additional'] . '|' . $value. '|' . ($value + 1),
     );
 
     // Check that the field is displayed with the default formatter in 'rss'
diff --git a/core/modules/file/lib/Drupal/file/Plugin/Field/FieldWidget/FileWidget.php b/core/modules/file/lib/Drupal/file/Plugin/Field/FieldWidget/FileWidget.php
index 9267eae..5b5a964 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/Field/FieldWidget/FileWidget.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/Field/FieldWidget/FileWidget.php
@@ -21,9 +21,6 @@
  *   label = @Translation("File"),
  *   field_types = {
  *     "file"
- *   },
- *   settings = {
- *     "progress_indicator" = "throbber"
  *   }
  * )
  */
@@ -32,6 +29,15 @@ class FileWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['progress_indicator'] = 'throbber';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['progress_indicator'] = array(
       '#type' => 'radios',
diff --git a/core/modules/image/lib/Drupal/image/Plugin/Field/FieldFormatter/ImageFormatter.php b/core/modules/image/lib/Drupal/image/Plugin/Field/FieldFormatter/ImageFormatter.php
index 6a9a44e..f7665c2 100644
--- a/core/modules/image/lib/Drupal/image/Plugin/Field/FieldFormatter/ImageFormatter.php
+++ b/core/modules/image/lib/Drupal/image/Plugin/Field/FieldFormatter/ImageFormatter.php
@@ -17,10 +17,6 @@
  *   label = @Translation("Image"),
  *   field_types = {
  *     "image"
- *   },
- *   settings = {
- *     "image_style" = "",
- *     "image_link" = ""
  *   }
  * )
  */
@@ -29,6 +25,16 @@ class ImageFormatter extends ImageFormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['image_style'] = '';
+    $settings['image_link'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $image_styles = image_style_options(FALSE);
     $element['image_style'] = array(
diff --git a/core/modules/image/lib/Drupal/image/Plugin/Field/FieldWidget/ImageWidget.php b/core/modules/image/lib/Drupal/image/Plugin/Field/FieldWidget/ImageWidget.php
index 94528ae..858f1d8 100644
--- a/core/modules/image/lib/Drupal/image/Plugin/Field/FieldWidget/ImageWidget.php
+++ b/core/modules/image/lib/Drupal/image/Plugin/Field/FieldWidget/ImageWidget.php
@@ -19,10 +19,6 @@
  *   label = @Translation("Image"),
  *   field_types = {
  *     "image"
- *   },
- *   settings = {
- *     "progress_indicator" = "throbber",
- *     "preview_image_style" = "thumbnail",
  *   }
  * )
  */
@@ -31,6 +27,16 @@ class ImageWidget extends FileWidget {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['progress_indicator'] = 'throbber';
+    $settings['preview_image_style'] = 'thumbnail';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element = parent::settingsForm($form, $form_state);
 
diff --git a/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkFormatter.php b/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkFormatter.php
index 921970d..03080a8 100644
--- a/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkFormatter.php
+++ b/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkFormatter.php
@@ -21,13 +21,6 @@
  *   label = @Translation("Link"),
  *   field_types = {
  *     "link"
- *   },
- *   settings = {
- *     "trim_length" = "80",
- *     "url_only" = "",
- *     "url_plain" = "",
- *     "rel" = "",
- *     "target" = ""
  *   }
  * )
  */
@@ -36,6 +29,19 @@ class LinkFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['trim_length'] = '80';
+    $settings['url_only'] = '';
+    $settings['url_plain'] = '';
+    $settings['rel'] = '';
+    $settings['target'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $elements = parent::settingsForm($form, $form_state);
 
diff --git a/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php b/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php
index 4392123..76698a8 100644
--- a/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php
+++ b/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php
@@ -22,11 +22,6 @@
  *   label = @Translation("Separate link text and URL"),
  *   field_types = {
  *     "link"
- *   },
- *   settings = {
- *     "trim_length" = "80",
- *     "rel" = "",
- *     "target" = ""
  *   }
  * )
  */
@@ -35,6 +30,17 @@ class LinkSeparateFormatter extends LinkFormatter {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['trim_length'] = '80';
+    $settings['rel'] = '';
+    $settings['target'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function viewElements(FieldItemListInterface $items) {
     $element = array();
     $entity = $items->getEntity();
diff --git a/core/modules/link/lib/Drupal/link/Plugin/Field/FieldWidget/LinkWidget.php b/core/modules/link/lib/Drupal/link/Plugin/Field/FieldWidget/LinkWidget.php
index dc10574..26b5f9c 100644
--- a/core/modules/link/lib/Drupal/link/Plugin/Field/FieldWidget/LinkWidget.php
+++ b/core/modules/link/lib/Drupal/link/Plugin/Field/FieldWidget/LinkWidget.php
@@ -18,10 +18,6 @@
  *   label = @Translation("Link"),
  *   field_types = {
  *     "link"
- *   },
- *   settings = {
- *     "placeholder_url" = "",
- *     "placeholder_title" = ""
  *   }
  * )
  */
@@ -30,6 +26,16 @@ class LinkWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['placeholder_url'] = '';
+    $settings['placeholder_title'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $element['url'] = array(
       '#type' => 'url',
diff --git a/core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberDecimalFormatter.php b/core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberDecimalFormatter.php
index 3b6ac2b..d7c2f22 100644
--- a/core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberDecimalFormatter.php
+++ b/core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberDecimalFormatter.php
@@ -20,12 +20,6 @@
  *   field_types = {
  *     "number_decimal",
  *     "number_float"
- *   },
- *   settings = {
- *     "thousand_separator" = "",
- *     "decimal_separator" = ".",
- *     "scale" = "2",
- *     "prefix_suffix" = "TRUE"
  *   }
  * )
  */
@@ -34,6 +28,18 @@ class NumberDecimalFormatter extends DefaultNumberFormatter {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['thousand_separator'] = '';
+    $settings['decimal_separator'] = '.';
+    $settings['scale'] = 2;
+    $settings['prefix_suffix'] = TRUE;
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $elements = parent::settingsForm($form, $form_state);
 
diff --git a/core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberIntegerFormatter.php b/core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberIntegerFormatter.php
index 53ff874..7873fb4 100644
--- a/core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberIntegerFormatter.php
+++ b/core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberIntegerFormatter.php
@@ -19,10 +19,6 @@
  *   label = @Translation("Default"),
  *   field_types = {
  *     "number_integer"
- *   },
- *   settings = {
- *     "thousand_separator" = "",
- *     "prefix_suffix" = "TRUE"
  *   }
  * )
  */
@@ -31,6 +27,16 @@ class NumberIntegerFormatter extends DefaultNumberFormatter {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['thousand_separator'] = '';
+    $settings['prefix_suffix'] = TRUE;
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   protected function numberFormat($number) {
     return number_format($number, 0, '', $this->getSetting('thousand_separator'));
   }
diff --git a/core/modules/number/lib/Drupal/number/Plugin/Field/FieldWidget/NumberWidget.php b/core/modules/number/lib/Drupal/number/Plugin/Field/FieldWidget/NumberWidget.php
index 436e2cd..cc32b8c 100644
--- a/core/modules/number/lib/Drupal/number/Plugin/Field/FieldWidget/NumberWidget.php
+++ b/core/modules/number/lib/Drupal/number/Plugin/Field/FieldWidget/NumberWidget.php
@@ -21,9 +21,6 @@
  *     "number_integer",
  *     "number_decimal",
  *     "number_float"
- *   },
- *   settings = {
- *     "placeholder" = ""
  *   }
  * )
  */
@@ -32,6 +29,15 @@ class NumberWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['placeholder'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['placeholder'] = array(
       '#type' => 'textfield',
diff --git a/core/modules/options/lib/Drupal/options/Plugin/Field/FieldWidget/OnOffWidget.php b/core/modules/options/lib/Drupal/options/Plugin/Field/FieldWidget/OnOffWidget.php
index 34b741e..0f850b1 100644
--- a/core/modules/options/lib/Drupal/options/Plugin/Field/FieldWidget/OnOffWidget.php
+++ b/core/modules/options/lib/Drupal/options/Plugin/Field/FieldWidget/OnOffWidget.php
@@ -19,9 +19,6 @@
  *   field_types = {
  *     "list_boolean"
  *   },
- *   settings = {
- *     "display_label" = FALSE,
- *   },
  *   multiple_values = TRUE
  * )
  */
@@ -30,6 +27,15 @@ class OnOffWidget extends OptionsWidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['display_label'] = FALSE;
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['display_label'] = array(
       '#type' => 'checkbox',
diff --git a/core/modules/picture/lib/Drupal/picture/Plugin/Field/FieldFormatter/PictureFormatter.php b/core/modules/picture/lib/Drupal/picture/Plugin/Field/FieldFormatter/PictureFormatter.php
index a6d3b9c..8d54702 100644
--- a/core/modules/picture/lib/Drupal/picture/Plugin/Field/FieldFormatter/PictureFormatter.php
+++ b/core/modules/picture/lib/Drupal/picture/Plugin/Field/FieldFormatter/PictureFormatter.php
@@ -18,11 +18,6 @@
  *   label = @Translation("Picture"),
  *   field_types = {
  *     "image",
- *   },
- *   settings = {
- *     "picture_mapping" = "",
- *     "fallback_image_style" = "",
- *     "image_link" = "",
  *   }
  * )
  */
@@ -31,6 +26,17 @@ class PictureFormatter extends ImageFormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['picture_mapping'] = '';
+    $settings['fallback_image_style'] = '';
+    $settings['image_link'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $picture_options = array();
     $picture_mappings = entity_load_multiple('picture_mapping');
diff --git a/core/modules/system/tests/modules/entity_test/entity_test.install b/core/modules/system/tests/modules/entity_test/entity_test.install
index 3df5396..9e48029 100644
--- a/core/modules/system/tests/modules/entity_test/entity_test.install
+++ b/core/modules/system/tests/modules/entity_test/entity_test.install
@@ -32,7 +32,7 @@ function entity_test_install() {
     ))->save();
 
     entity_get_form_display($entity_type, $entity_type, 'default')
-      ->setComponent('field_test_text', array('type' => 'text_text'))
+      ->setComponent('field_test_text', array('type' => 'text_textfield'))
       ->save();
   }
 }
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/Field/FieldWidget/TaxonomyAutocompleteWidget.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/Field/FieldWidget/TaxonomyAutocompleteWidget.php
index 7c20732..addfb69 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/Field/FieldWidget/TaxonomyAutocompleteWidget.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/Field/FieldWidget/TaxonomyAutocompleteWidget.php
@@ -19,11 +19,6 @@
  *   field_types = {
  *     "taxonomy_term_reference"
  *   },
- *   settings = {
- *     "size" = "60",
- *     "autocomplete_route_name" = "taxonomy.autocomplete",
- *     "placeholder" = ""
- *   },
  *   multiple_values = TRUE
  * )
  */
@@ -32,6 +27,17 @@ class TaxonomyAutocompleteWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['size'] = '60';
+    $settings['autocomplete_route_name'] = 'taxonomy.autocomplete';
+    $settings['placeholder'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['placeholder'] = array(
       '#type' => 'textfield',
diff --git a/core/modules/telephone/lib/Drupal/telephone/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php b/core/modules/telephone/lib/Drupal/telephone/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
index 436a4fc..bbcabd3 100644
--- a/core/modules/telephone/lib/Drupal/telephone/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
+++ b/core/modules/telephone/lib/Drupal/telephone/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
@@ -18,9 +18,6 @@
  *   label = @Translation("Telephone link"),
  *   field_types = {
  *     "telephone"
- *   },
- *   settings = {
- *     "title" = ""
  *   }
  * )
  */
@@ -29,6 +26,15 @@ class TelephoneLinkFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['title'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $elements['title'] = array(
       '#type' => 'textfield',
diff --git a/core/modules/telephone/lib/Drupal/telephone/Plugin/Field/FieldWidget/TelephoneDefaultWidget.php b/core/modules/telephone/lib/Drupal/telephone/Plugin/Field/FieldWidget/TelephoneDefaultWidget.php
index 78c768e..f6570b5 100644
--- a/core/modules/telephone/lib/Drupal/telephone/Plugin/Field/FieldWidget/TelephoneDefaultWidget.php
+++ b/core/modules/telephone/lib/Drupal/telephone/Plugin/Field/FieldWidget/TelephoneDefaultWidget.php
@@ -18,14 +18,19 @@
  *   label = @Translation("Telephone number"),
  *   field_types = {
  *     "telephone"
- *   },
- *   settings = {
- *     "placeholder" = ""
  *   }
  * )
  */
 class TelephoneDefaultWidget extends WidgetBase {
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['placeholder'] = '';
+    return $settings;
+  }
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldFormatter/TextSummaryOrTrimmedFormatter.php b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldFormatter/TextSummaryOrTrimmedFormatter.php
index baebdc1..71b2088 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldFormatter/TextSummaryOrTrimmedFormatter.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldFormatter/TextSummaryOrTrimmedFormatter.php
@@ -16,9 +16,6 @@
  *   field_types = {
  *     "text_with_summary"
  *   },
- *   settings = {
- *     "trim_length" = "600"
- *   },
  *   edit = {
  *     "editor" = "form"
  *   }
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
index 8100e7b..5609ceb 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
@@ -25,9 +25,6 @@
  *     "text_long",
  *     "text_with_summary"
  *   },
- *   settings = {
- *     "trim_length" = "600"
- *   },
  *   edit = {
  *     "editor" = "form"
  *   }
@@ -38,6 +35,15 @@ class TextTrimmedFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['trim_length'] = '600';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['trim_length'] = array(
       '#title' => t('Trim length'),
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php
index 9752a1f..d03d8a4 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php
@@ -19,10 +19,6 @@
  *   label = @Translation("Text area (multiple rows)"),
  *   field_types = {
  *     "text_long"
- *   },
- *   settings = {
- *     "rows" = "5",
- *     "placeholder" = ""
  *   }
  * )
  */
@@ -31,6 +27,16 @@ class TextareaWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['rows'] = '5';
+    $settings['placeholder'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element['rows'] = array(
       '#type' => 'number',
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWithSummaryWidget.php b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWithSummaryWidget.php
index 4775b86..1b07029 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWithSummaryWidget.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWithSummaryWidget.php
@@ -19,11 +19,6 @@
  *   label = @Translation("Text area with a summary"),
  *   field_types = {
  *     "text_with_summary"
- *   },
- *   settings = {
- *     "rows" = "9",
- *     "summary_rows" = "3",
- *     "placeholder" = ""
  *   }
  * )
  */
@@ -32,6 +27,17 @@ class TextareaWithSummaryWidget extends TextareaWidget {
   /**
    * {@inheritdoc}
    */
+  public static function settings() {
+    $settings = parent::settings();
+    $settings['rows'] = '9';
+    $settings['summary_rows'] = '3';
+    $settings['placeholder'] = '';
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element = parent::settingsForm($form, $form_state);
     $element['summary_rows'] = array(
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextfieldWidget.php b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextfieldWidget.php
index 35f6957..989bcb8 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextfieldWidget.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextfieldWidget.php
@@ -21,10 +21,6 @@
  *     "text",
  *     "string"
  *   },
- *   settings = {
- *     "size" = "60",
- *     "placeholder" = ""
- *   }
  * )
  */
 class TextfieldWidget extends StringWidget {