public static BinlogOffset getBinlogPosition(SourceRecord dataRecord) {
        return getBinlogPosition(dataRecord.sourceOffset());
    }
Returns the start offset of the binlog split.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/source/utils/RecordUtils.java