{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"self.label_ribs.push(LabelRib::new(kind));"}]}
        self.label_ribs.push(LabelRib::new(kind));
    fn with_label_rib<T>(&mut self, kind: RibKind, f: impl FnOnce(&mut Self) -> T) -> T {
        let res = f(self);