code: public void marshall(HadoopStepConfig hadoopStepConfig, ProtocolMarshaller protocolMarshaller) {
  
          if (hadoopStepConfig == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(hadoopStepConfig.getJar(), JAR_BINDING);
              protocolMarshaller.marshall(hadoopStepConfig.getProperties(), PROPERTIES_BINDING);
              protocolMarshaller.marshall(hadoopStepConfig.getMainClass(), MAINCLASS_BINDING);
              protocolMarshaller.marshall(hadoopStepConfig.getArgs(), ARGS_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.