docs: public void marshall(ReferenceDataSourceUpdate referenceDataSourceUpdate, ProtocolMarshaller protocolMarshaller) {
  
          if (referenceDataSourceUpdate == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(referenceDataSourceUpdate.getReferenceId(), REFERENCEID_BINDING);
              protocolMarshaller.marshall(referenceDataSourceUpdate.getTableNameUpdate(), TABLENAMEUPDATE_BINDING);
              protocolMarshaller.marshall(referenceDataSourceUpdate.getS3ReferenceDataSourceUpdate(), S3REFERENCEDATASOURCEUPDATE_BINDING);
              protocolMarshaller.marshall(referenceDataSourceUpdate.getReferenceSchemaUpdate(), REFERENCESCHEMAUPDATE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }