public static bool testOptionalNumSample()
{
VariabilityModel withOptional = SampleUtil.loadOptionalVM();
List <Configuration> sampledWithOptional = SampleUtil.sampleWholePopulation(withOptional);
return(7 == sampledWithOptional.Count && sampledWithOptional.Exists(x =>
x.BinaryOptions.ContainsKey(withOptional.AbrstactOptions[0])));
}