Trying to use one type from another type doesn't seem to work:
(deftype Foo [^int a ^int b])
(definterface Bars (^Foo makefoo []))
(deftype Bar [^int a ^int b] Bars (^Foo makefoo [this] (Foo. 1 2)))
;java.lang.NoClassDefFoundError: java/lang/Foo.
How do I get Foo to be visible to Bar?