{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"|(&(place,"}]}
                |(&(place, path), &unwind_succ, &dropline_to)| {
            .chain(itertools::izip!(fields.iter().rev(), unwind_ladder, dropline_ladder).map(
                    succ = self.drop_subpath(place, path, succ, unwind_succ, dropline_to);