}

func (c byAccessModes) Swap(i, j int) {
	c.modes[i], c.modes[j] = c.modes[j], c.modes[i]
}

func (c byAccessModes) Len() int {
	return len(c.modes)
}

func claimToClaimKey(claim *v1.PersistentVolumeClaim) string {
	return fmt.Sprintf("%s/%s", claim.Namespace, claim.Name)
}

func claimrefToClaimKey(claimref *v1.ObjectReference) string {

		if err != nil {
			logger.V(2).Info("Synchronizing unbound PersistentVolumeClaim, Error finding PV for claim", "PVC", klog.KObj(claim), "err", err)
			return fmt.Errorf("error finding PV for claim %q: %w", claimToClaimKey(claim), err)
		}
		if volume == nil {
			logger.V(4).Info("Synchronizing unbound PersistentVolumeClaim, no volume found", "PVC", klog.KObj(claim))
			// No PV could be found. Try to provision one if possible.

	logger := klog.FromContext(ctx)
	if err := ctrl.claims.Delete(claim); err != nil {
		logger.Error(err, "Claim deletion encountered", "PVC", klog.KObj(claim))
	}
	claimKey := claimToClaimKey(claim)
	logger.V(4).Info("Claim deleted", "PVC", klog.KObj(claim))
	// clean any possible unfinished provision start timestamp from cache
	// Unit test [5-8] [5-9]
	ctrl.operationTimestamps.Delete(claimKey)