Whoops, I missed two lines when converting my code to example code ...
> <code>
> public MyApp() {
> /* add classes */
> classes = new HashSet<Class<?>>();
> classes.add( GrossAdultInfoHandler.class );
> classes.add( InfoChildHandler.class );
should have been
public MyApp() {
/* add classes */
classes = new HashSet<Class<?>>();
classes.add( FooHandler.class );
Sorry about that (although it is not really important for the question).
