Well the problem will be: how can the user customize several libraries resource reference: ie `calendar` and `jquery-ui` for instance, in the same application?
That's the point I had raised here: http://mail-archives.apache.org/mod_mbox/wicket-users/201403.mbox/%3CCAAJwaYVYkYBre9jD7AhtC59MGa9Ng+13Ktf3AW-H8YzJ4uM6Mg@mail.gmail.com%3E
> I think that, by writing a new strategy for loading/customizing javascript library resource references, it would be nice to solve this question in the meantime...