{"ast_node_type":"impl","tokens":[{"end":185,"kind":"keyword","start":0,"text":"const"}]}
        const NORMALIZE_ERASING_LATE_BOUND_REGIONS: &str = "rustc_middle::ty::normalize_erasing_regions::<impl rustc_middle::ty::context::TyCtxt>::normalize_erasing_late_bound_regions";
        if let Some(index) = stack.find(NORMALIZE_ERASING_LATE_BOUND_REGIONS) {