[aspectwerkz-user] Swap implementation of mixin?

In the paper "Dynamic AOP and Runtime Weaving for Java - How does
Aspectwerkz Address It?" you are talking about swapping the
implemenation of a mixin at runtime. But on the website I dont see any
instructions on how to do this. Is swapping of the mixin possible with
the current version of Aspectwerkz? And how do I need to do that?

Thanks

Steven.