code: func (u *apiUtil) DeletePV(pvName string) error {
  	startTime := time.Now()
  	metrics.APIServerRequestsTotal.WithLabelValues(metrics.APIServerRequestDelete).Inc()
  	err := u.client.CoreV1().PersistentVolumes().Delete(pvName, &metav1.DeleteOptions{})
  	metrics.APIServerRequestsDurationSeconds.WithLabelValues(metrics.APIServerRequestDelete).Observe(time.Since(startTime).Seconds())
  	if err != nil {
  		metrics.APIServerRequestsFailedTotal.WithLabelValues(metrics.APIServerRequestDelete).Inc()
  	}
  	return err
  }
docs: // DeletePV will delete a PersistentVolume