stopFunc := e.startObservingCount(opts.CountMetricPollPeriod, opts.StorageObjectCountTracker)
			previousDestroy := e.DestroyFunc
			var once sync.Once
			e.DestroyFunc = func() {
				once.Do(func() {
					stopFunc()
					if previousDestroy != nil {
						previousDestroy()
					}
				})
			}
		}
	}

	return nil
}