+module test
+
+import StdEnv, StdMaybe
+
+Start :: (Maybe Int, Maybe (Maybe Int))
+Start = (id (dynamic 42), kid (dynamic (Just 42)))
+
+id :: Dynamic -> Maybe m | TC m
+id (m :: m^) = Just m
+id _ = Nothing
+
+kid :: Dynamic -> Maybe (m a) | TC (m a)
+kid (m :: (m a)^)) = Just m
+kid _ = Nothing