code: public void marshall(UpdateAppRequest updateAppRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (updateAppRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(updateAppRequest.getAppId(), APPID_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getName(), NAME_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getDescription(), DESCRIPTION_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getDataSources(), DATASOURCES_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getType(), TYPE_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getAppSource(), APPSOURCE_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getDomains(), DOMAINS_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getEnableSsl(), ENABLESSL_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getSslConfiguration(), SSLCONFIGURATION_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getAttributes(), ATTRIBUTES_BINDING);
              protocolMarshaller.marshall(updateAppRequest.getEnvironment(), ENVIRONMENT_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.