public KinesisSystemDescriptor withRegion(String region) {
    this.region = Optional.ofNullable(StringUtils.stripToNull(region));
    return this;
  }
Kinesis region for this system.
@param region Kinesis region
@return this system descriptor
samza-aws/src/main/java/org/apache/samza/system/kinesis/descriptors/KinesisSystemDescriptor.java