{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"//"}]}
            // FIXME(dyn-star): Do the right thing with DynKinds
        (&ty::Dynamic(from_traits, _, _from_kind), &ty::Dynamic(to_traits, _, _to_kind)) => {
            for (from, to) in from_traits.iter().zip(to_traits) {