code: public void marshall(DescribeDocumentVersionsRequest describeDocumentVersionsRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (describeDocumentVersionsRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(describeDocumentVersionsRequest.getAuthenticationToken(), AUTHENTICATIONTOKEN_BINDING);
              protocolMarshaller.marshall(describeDocumentVersionsRequest.getDocumentId(), DOCUMENTID_BINDING);
              protocolMarshaller.marshall(describeDocumentVersionsRequest.getMarker(), MARKER_BINDING);
              protocolMarshaller.marshall(describeDocumentVersionsRequest.getLimit(), LIMIT_BINDING);
              protocolMarshaller.marshall(describeDocumentVersionsRequest.getInclude(), INCLUDE_BINDING);
              protocolMarshaller.marshall(describeDocumentVersionsRequest.getFields(), FIELDS_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.