public PoolStatHelper getEventPoolHelper() {
    return new PoolStatHelper() {
      @Override
      public void startJob() {
        incEventThreads(1);
      }

      @Override
      public void endJob() {
        incEventThreads(-1);
      }
    };
  }
Returns a helper object so that the event pool can record its stats to the proper cache perf
stats.

@since GemFire 3.5
geode-core/src/main/java/org/apache/geode/internal/cache/CachePerfStats.java