{"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(index) = stack.find(NORMALIZE_ERASING_LATE_BOUND_REGIONS) {
        const NORMALIZE_ERASING_LATE_BOUND_REGIONS: &str = "rustc_middle::ty::normalize_erasing_regions::<impl rustc_middle::ty::context::TyCtxt>::normalize_erasing_late_bound_regions";
            stack = &stack[..index + NORMALIZE_ERASING_LATE_BOUND_REGIONS.len()];