public void addControllerParams(Map<String, String> controllerParams) {
   if (controllerParams == null) {
     return;
   }
   setControllerParams(new StringMap());
   _controllerParams.putAll(controllerParams);
 }
 public void addTierUtilizationPercentage(Map<String, String> tierUtilizationPercentage) {
   if (null == _tierUtilizationPercentage) {
     setTierUtilizationPercentage(new StringMap());
   } else {
     _tierUtilizationPercentage.clear();
   }
   if (tierUtilizationPercentage.size() > 0) {
     _tierUtilizationPercentage.putAll(tierUtilizationPercentage);
   }
 }