Examples of stateful transformationoperations:– countByKey– Counts the number of instances of each keyin the stream; results in a new, everupdatingKTable– reduceByKey– Combines values of the stream using asupplied Reducer into a new, everupdatingKTable▪ For a full list of operations, see the JavaDocsat -http://docs.confluent.io/3.0.0/streams/javadocs/index.htm