did they deprecate transform in 3.3.0 only to replace it with a side-effectful api? https://cwiki.apache.org/confluence/display/KAFKA/KIP-820%3A+Extend+KStream+process+with+new+Processor+API#KIP820:ExtendKStreamprocesswithnewProcessorAPI-KStream#processandKStream#processValuestoreplacingmostTransformers