/**
  * User action to disable a Feature.
  *
  * @param req http request containing operation parameters
  */
 private void opDisableFeature(FeatureStore store, String featureId) {
   if (featureId != null && !featureId.isEmpty()) {
     store.disable(featureId);
     log.info(featureId + " has been disabled");
   }
 }