{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"MixedUnit::Char(c)"}]}
            MixedUnit::Char(c) => buf.extend(c.encode_utf8(&mut [0; 4]).as_bytes()),
        let extend_unit = |buf: &mut Vec<u8>, unit: MixedUnit| match unit {
            MixedUnit::HighByte(b) => buf.push(b),