Message2942

> Since most of AbstractSet operates on the Iterator returned by its
> concrete implementation, and PyMapSet has to implement iterator, the
> methods on AbstractSet will go through that iterator.  I've attached
> a new version of your patch that uses AbstractSet and passes your
> tests.  It eliminates 9 methods: hashCode, equals, retainAll,
> removeAll, containsAll, add, addAll, toArray and isEmpty.  Am I
> missing something?

Yea, that looks good, I didn't realize that the AbstractSet explicitly
used the Iterator for the interface, as opposed to an implementation
detail subject to possible change.  Could probably remove size() and
clear() also.