{"ast_node_type":"function","tokens":[{"end":77,"kind":"keyword","start":0,"text":"fn"}]}
    fn new(tcx: TyCtxt<'tcx>, current_id: HirId) -> ParentHirIterator<'tcx> {
impl<'tcx> ParentHirIterator<'tcx> {
        ParentHirIterator { current_id, tcx, current_owner_nodes: None }