docs: public void marshall(S3DataSource s3DataSource, ProtocolMarshaller protocolMarshaller) {
  
          if (s3DataSource == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(s3DataSource.getS3DataType(), S3DATATYPE_BINDING);
              protocolMarshaller.marshall(s3DataSource.getS3Uri(), S3URI_BINDING);
              protocolMarshaller.marshall(s3DataSource.getS3DataDistributionType(), S3DATADISTRIBUTIONTYPE_BINDING);
              protocolMarshaller.marshall(s3DataSource.getAttributeNames(), ATTRIBUTENAMES_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }