{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"(&ty::Ref(_,"}]}
            (&ty::Ref(_, ty_a, mutbl_a), &ty::Ref(_, _, mutbl_b)) => {
        let reborrow = match (source.kind(), target.kind()) {
                coerce_mutbls(mutbl_a, mutbl_b)?;