public static HistoryRecord getHistoryRecord(SourceRecord schemaRecord) throws IOException {
        Struct value = (Struct) schemaRecord.value();
        String historyRecordStr = value.getString(HISTORY_RECORD_FIELD);
        return new HistoryRecord(DOCUMENT_READER.read(historyRecordStr));
    }
Returns a split which contain the specific key.

@param splitInfos split info list.
@param target the specific key.
@return A split which contain the specific key.
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