@Override
    public void applyWritableMetadata(List<String> metadataKeys, DataType consumedDataType) {
        this.metadataKeys = metadataKeys;
        this.consumedDataType = consumedDataType;
    }
Parallelism of the physical Kafka producer. *
inlong-sort/sort-flink/sort-flink-v1.18/sort-connectors/kafka/src/main/java/org/apache/inlong/sort/kafka/table/KafkaDynamicSink.java