(module test_22b1_dup_same_module
  (class TShow
    (param a)
    (method tshow
      (type (fn-type (params a) (ret (con Str))))))
  (instance
    (class TShow)
    (type (con Int))
    (method tshow
      (body "first")))
  (instance
    (class TShow)
    (type (con Int))
    (method tshow
      (body "second"))))