public KinesisSystemDescriptor withProxyPort(int proxyPort) {
    this.proxyPort = Optional.of(proxyPort);
    return this;
  }
Proxy port to be used for this system.
@param proxyPort Proxy port
@return this system descriptor
samza-aws/src/main/java/org/apache/samza/system/kinesis/descriptors/KinesisSystemDescriptor.java