public DigestHandler(final UpdateSite site) {
   super(DIGEST);
   repoDescriptor =
       new UpdateSiteDescriptor(
           site.getUri(), ExecutionEnvironmentProfileProvider.getInstance());
   addChild(
       new FeatureHandler(),
       new ChildElementHandler<FeatureHandler>() {
         public void childHanlded(FeatureHandler child) {
           repoDescriptor.addFeature(child.feature);
         }
       });
 }