private string OptParamStr(Action<IParams> optionalParam)
{
var optParams = new VehicleParams();
if (optionalParam != null)
optionalParam(optParams);
var optParamStr = optParams.GetParams();
if (string.IsNullOrWhiteSpace(optParamStr))
optParamStr = "No additinional specs";
return optParamStr;
}
