}
// This should never be null and should cast properly.
WidgetDefaultModule widgetModule = (WidgetDefaultModule) protocol.getWidgetModule();
MultipleValidatorBuilder builder = widgetModule.getMultipleValidatorBuilder();
// Render all multiple validators, which were added to the builder.
Iterator iterator = builder.getMultipleValidatorsIterator();
while (iterator.hasNext()) {
MultipleValidator validator = (MultipleValidator) iterator.next();
render(protocol, builder, validator);