@Target(value=ANNOTATION_TYPE)
@Retention(value=RUNTIME)
@Documented
@GwtCompatible
public @interface TesterAnnotation

Use this to meta-annotate XxxFeature.Require annotations, so that those annotations can be used to decide whether to apply a test to a given class-under-test.
This is needed because annotations can't implement interfaces, which is also why reflection is used to extract values from the properties of the various annotations.