{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
            let id = tcx.local_def_id_to_hir_id(item_def_id);
        DefKind::AnonConst if tcx.features().generic_const_exprs() => {
            if tcx.hir_opt_const_param_default_param_def_id(id).is_some() {