@Override
    protected InLongMsgHead parseHead(String attr) throws Exception {
        return InLongMsgTlogCsvUtils.parseHead(attr);
    }
Quote character. Null if quoting is disabled.
inlong-sort/sort-formats/format-row/format-inlongmsg-tlogcsv/src/main/java/org/apache/inlong/sort/formats/inlongmsgtlogcsv/InLongMsgTlogCsvMixedFormatDeserializer.java