public NewTopicBuilder replicationFactor(short replicationFactor) {
            this.replicationFactor = replicationFactor;
            return this;
        }
Specify the desired replication factor for the topic.

@param replicationFactor the desired replication factor; must be positive, or -1 to
                         signify using the broker's default
@return this builder to allow methods to be chained; never null
connect/runtime/src/main/java/org/apache/kafka/connect/util/TopicAdmin.java