{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"(0..len).map::<ty::GenericArg<'tcx>,"}]}
            (0..len).map::<ty::GenericArg<'tcx>, _>(|_| Decodable::decode(decoder)),
        tcx.mk_args_from_iter(
        )