{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"search_stack:"}]}
        search_stack: &mut Vec<(Ty<'tcx>, &'hir hir::Ty<'hir>)>,
        last_segment: &'hir hir::PathSegment<'hir>,
    ) -> Option<RegionNameHighlight> {