4d0595a: fix: workaround for dfinity/candid#273 (#323)
* fix: workaround for dfinity/candid#273 With a little elbow grease we can even get around `Func`'s limitations. We use `Type::Empty` because args subtype in the opposite direction.
* fix: workaround for dfinity/candid#273 With a little elbow grease we can even get around `Func`'s limitations. We use `Type::Empty` because args subtype in the opposite direction.