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)
}
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)
}
// scsiControllerListString pretty-prints a slice of SCSI controllers.