9 methods override WidgetBase::settingsForm()

EmailDefaultWidget::settingsForm in drupal/core/modules/field/modules/email/lib/Drupal/email/Plugin/field/widget/EmailDefaultWidget.php
Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().
FileWidget::settingsForm in drupal/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php
Implements \Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().
LegacyWidget::settingsForm in drupal/core/modules/field/lib/Drupal/field/Plugin/field/widget/LegacyWidget.php
Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().
NumberWidget::settingsForm in drupal/core/modules/field/modules/number/lib/Drupal/number/Plugin/field/widget/NumberWidget.php
Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().
TaxonomyAutocompleteWidget::settingsForm in drupal/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php
Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().
TestFieldWidget::settingsForm in drupal/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidget.php
Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().
TestFieldWidgetMultiple::settingsForm in drupal/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidgetMultiple.php
Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().
TextareaWidget::settingsForm in drupal/core/modules/field/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWidget.php
Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().
TextfieldWidget::settingsForm in drupal/core/modules/field/modules/text/lib/Drupal/text/Plugin/field/widget/TextfieldWidget.php
Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::settingsForm().