IdentityObject and InlineObject

[Brian Goetz]

> package java.util;
> public class IdentityHashMap<E extends IdentityObject> { ... }

This one has an easy out:

     public class IdentityHashMap<E extends Object&IdentityObject> { ... }

I was hoping your example would be type bounds, since they're easily 
amenable to this trick (either explicitly, or with compiler help.) Got 
more?