in flink-connector-cassandra/src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraSink.java [187:194]
public CassandraSink<IN> slotSharingGroup(String slotSharingGroup) {
if (useDataStreamSink) {
getSinkTransformation().setSlotSharingGroup(slotSharingGroup);
} else {
getTransformation().setSlotSharingGroup(slotSharingGroup);
}
return this;
}