Base interface definition for "Field widget" plugins. This interface details base wrapping methods that most widget implementations will want
public WidgetBaseInterface::form(FieldItemListInterface $items
public static WidgetBaseInterface::setWidgetState(array $parents
public WidgetBaseInterface::extractFormValues(FieldItemListInterface
public WidgetBaseInterface::flagErrors(FieldItemListInterface
public static WidgetBaseInterface::getWidgetState(array $parents