instance?

[Chris Dean]

I'd like to implement an alternate to `instance?' by creating a `?'
method in a define-namespace alias.  That is:

        (define-namespace date "class:java.util.Date")
        (date:? (date:new)) ==> #t
        (date:? "hello")    ==> #f

I'm having some trouble finding where to add this code.  Can you point
me to where 'new' method name is implemented in the Java code?

Regards,
Chris Dean