{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"unescape_byte_str(s,"}]}
        unescape_byte_str(s, |range, res| callback(range, res.map(char::from)))
    fn unescape(s: &str, mut callback: impl FnMut(Range<usize>, Result<char, EscapeError>)) {
    }