code: func (ub *URLBuilder) BuildBlobUploadChunkURL(name reference.Named, uuid string, values ...url.Values) (string, error) {
  	route := ub.cloneRoute(RouteNameBlobUploadChunk)
  
  	uploadURL, err := route.URL("name", name.Name(), "uuid", uuid)
  	if err != nil {
  		return "", err
  	}
  
  	return appendValuesURL(uploadURL, values...).String(), nil
  }
docs: // BuildBlobUploadChunkURL constructs a url for the upload identified by uuid,
  // including any url values. This should generally not be used by clients, as
  // this url is provided by server implementations during the blob upload
  // process.