in flink-connector-cassandra/src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraSink.java [132:139]
public CassandraSink<IN> setUidHash(String uidHash) {
if (useDataStreamSink) {
getSinkTransformation().setUidHash(uidHash);
} else {
getTransformation().setUidHash(uidHash);
}
return this;
}