{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"ty::Ref(_,"}]}
            ty::Ref(_, ty, mutbl) => (true, ty::TypeAndMut { ty, mutbl }),
        let (is_ref, mt_a) = match *a.kind() {
            ty::RawPtr(ty, mutbl) => (false, ty::TypeAndMut { ty, mutbl }),