public WidgetBase::flagErrors(FieldItemListInterface $items, ConstraintViolationListInterface
public WidgetBase::extractFormValues(FieldItemListInterface $items, array $form
public WidgetBase::form(FieldItemListInterface $items, array &$form, FormStateInterface
protected WidgetBase::getFieldSetting($setting_name)
protected WidgetBase::formSingleElement(FieldItemListInterface $items, $delta
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