Kafka Streams: one record to multiple records

Given: I have two topics in Kafka let's say topic A and topic B. The Kafka Stream reads a record from topic A, processes it and produces multiple records (let's say recordA and recordB) corresponding to the consumed record. Now, the question is how can I achieve this using Kafka Streams.

KStream<String, List<Message>> producerStreams[] = recordStream.mapValues(new ValueMapper<Message, List<Message>>() {
        @Override
        public List<Message> apply(final Message message) {
          return consumerRecordHandler.process(message);
        }
    }).*someFunction*()

Here, the record read is Message; After processing it returns a list of Message. How can I divide this list to two producer streams? Any help will be appreciated.