code: func scsiControllerListString(ctlrs []types.BaseVirtualSCSIController) string {
  	var l object.VirtualDeviceList
  	for _, ctlr := range ctlrs {
  		if ctlr == nil {
  			l = append(l, types.BaseVirtualDevice(nil))
  		} else {
  			l = append(l, ctlr.(types.BaseVirtualDevice))
  		}
  	}
  	return DeviceListString(l)
  }
docs: // scsiControllerListString pretty-prints a slice of SCSI controllers.