{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
        let (CfgAtom::Flag(sym) | CfgAtom::KeyValue { key: sym, .. }) = &atom;
    fn insert_any_atom(&mut self, atom: CfgAtom) {
        if *sym == sym::true_ || *sym == sym::false_ {