code: func updateDVSConfiguration(client *govmomi.Client, dvs *object.VmwareDistributedVirtualSwitch, spec *types.VMwareDVSConfigSpec) error {
  	ctx, cancel := context.WithTimeout(context.Background(), defaultAPITimeout)
  	defer cancel()
  	task, err := dvs.Reconfigure(ctx, spec)
  	if err != nil {
  		return err
  	}
  	tctx, tcancel := context.WithTimeout(context.Background(), defaultAPITimeout)
  	defer tcancel()
  	if err := task.Wait(tctx); err != nil {
  		return err
  	}
  	return nil
  }
docs: // updateDVSConfiguration contains the atomic update/wait operation for a DVS.