{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"TyKind::Ref(mt,"}]}
            TyKind::Ref(mt, _, ty) => (true, mt, ty),
        let (is_ref, from_mt, from_inner) = match from_ty.kind(Interner) {
            TyKind::Raw(mt, ty) => (false, mt, ty),