}
}

// StartOnce starts pod volume calc that will occur periodically in the background until s.StopOnce is called
func (s *volumeStatCalculator) StartOnce() *volumeStatCalculator {
	s.startO.Do(func() {
		go wait.JitterUntil(func() {
			s.calcAndStoreStats()
		}, s.jitterPeriod, 1.0, true, s.stopChannel)
	})
	return s
}

// StopOnce stops background pod volume calculation.  Will not stop a currently executing calculations until