{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"unescape_c_str(s,"}]}
        unescape_c_str(s, |range, _res| callback(range, Ok('_')))
    fn unescape(s: &str, mut callback: impl FnMut(Range<usize>, Result<char, EscapeError>)) {
    }