return nil
	}
	// delete any non-live history to maintain the revision limit.
	history = history[:(historyLen - historyLimit)]
	for i := 0; i < len(history); i++ {
		if err := ssc.controllerHistory.DeleteControllerRevision(history[i]); err != nil {
			return err
		}
	}
	return nil
}

// getStatefulSetRevisions returns the current and update ControllerRevisions for set. It also