Comment 12 for bug 650967

Looking back on this it seems to me that there isn't even a guarantee that our collections will, or should, be homogeneous. Certainly some of them already are not homogeneous (the things a builder built are of different types). I'm going to mark this as won't fix because of this: The type of a collection is 'collection of links', and the type of a dereferenced thing is self describing when returned. Clients that need type data should build that up on top of the wadl, and put safeguards to handle unexpected heterogeneity.