{"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"Ok(MixedUnit::Char(c))"}]}
                    Ok(MixedUnit::Char(c)) => {
                unescape_c_str(s, |_span, res| match res {
                        buf.extend_from_slice(c.get().encode_utf8(&mut [0; 4]).as_bytes())