{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"fmt.debug_set().entries(items.map(OneLinePrinter)).finish()"}]}
        fmt.debug_set().entries(items.map(OneLinePrinter)).finish()
        let items = self.rows().flat_map(|r| self.iter(r).map(move |c| (r, c)));
    }