func (l virtualDeviceListSorter) Less(i, j int) bool {
	li := l.Sort[i]
	lj := l.Sort[j]
	liCtlr := l.DeviceList.FindByKey(li.GetVirtualDevice().ControllerKey)
	ljCtlr := l.DeviceList.FindByKey(lj.GetVirtualDevice().ControllerKey)
	if liCtlr == nil || ljCtlr == nil {
		panic(errors.New("virtualDeviceListSorter cannot be used with devices that are not assigned to a controller"))
	}
	if liCtlr.(types.BaseVirtualController).GetVirtualController().BusNumber < liCtlr.(types.BaseVirtualController).GetVirtualController().BusNumber {
		return true
	}
	liUnit := li.GetVirtualDevice().UnitNumber
	ljUnit := lj.GetVirtualDevice().UnitNumber
	if liUnit == nil || ljUnit == nil {
		panic(errors.New("virtualDeviceListSorter cannot be used with devices that do not have unit numbers set"))
	}
	return *liUnit < *ljUnit
}
func (l virtualDeviceListSorter) Less(i, j int) bool {
	li := l.Sort[i]
	lj := l.Sort[j]
	liCtlr := l.DeviceList.FindByKey(li.GetVirtualDevice().ControllerKey)
	ljCtlr := l.DeviceList.FindByKey(lj.GetVirtualDevice().ControllerKey)
	if liCtlr == nil || ljCtlr == nil {
		panic(errors.New("virtualDeviceListSorter cannot be used with devices that are not assigned to a controller"))
	}
	if liCtlr.(types.BaseVirtualController).GetVirtualController().BusNumber < liCtlr.(types.BaseVirtualController).GetVirtualController().BusNumber {
		return true
	}
	liUnit := li.GetVirtualDevice().UnitNumber
	ljUnit := lj.GetVirtualDevice().UnitNumber
	if liUnit == nil || ljUnit == nil {
		panic(errors.New("virtualDeviceListSorter cannot be used with devices that do not have unit numbers set"))
	}
	return *liUnit < *ljUnit
}
// Less helps implement sort.Interface for virtualDeviceListSorter. A
// BaseVirtualDevice is "less" than another device if its controller's bus
// number and unit number combination are earlier in the order than the other.