Github user svenmeier commented on the issue:
https://github.com/apache/wicket/pull/246
Actually I'm wondering whether we should just add another method to
ITagModifier (possibly with better names):
```
public interface ITagModifier<T extends Annotation>
{
void modify(FormComponent<?> component, T annotation);
void modify(FormComponent<?> component, ComponentTag tag, T annotation);
}
```
This way we can use the identical lookup
BeanValidationConfiguration#getTagModifier() to alter the component itself from
#onConfigure() and the component tag from #onComponentTag().
All that's required for the new annotations is then:
```
register(Size.class, new SizeTagModifier());
register(NotNull.class, new RequiredTagModifier<NotNull>());
register(NotEmpty.class, new RequiredTagModifier<NotEmpty>());
register(NotBlank.class, new RequiredTagModifier<NotBlank>());
```
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