@Override
  public boolean verify(StatisticsFactory factory) {
    return _def.verify(factory);
  }
Base class for all the decorators

@see FunctionDecoratorImpl
@see GaugeThresholdDecoratorImpl
@see NumberThresholdDecoratorImpl
geode-core/src/main/java/org/apache/geode/internal/admin/statalerts/BaseDecoratorImpl.java