[weld-dev] are AnnotatedType and Co immutable?

Hi folks! If I pat(@Observes ProcessAnnotatedType annotatedType), is it allowed to simply modify the Sets? E.g. call annotatedType.getAnnotations().add(myOwnAnnotation) ? The spec imo doesn't mention that those Sets are immutable, so it should work. It works in OWB at least, but what about Weld and CanDI? txs and LieGrue, strub