public KinesisSystemDescriptor withKCLConfig(Map<String, String> kclConfig) {
    this.kclConfig = kclConfig;
    return this;
  }
KCL (Kinesis Client Library) config for this system. This is not required by default.
@param kclConfig A map of specified KCL configs
@return this system descriptor
samza-aws/src/main/java/org/apache/samza/system/kinesis/descriptors/KinesisSystemDescriptor.java