private Param <int> IsInRange(CompareParamTestSpec <int> spec)
 {
     return(Ensure.That(spec.Value, ParamName).IsInRange(spec.LowerLimit, spec.UpperLimit));
 }
 private Param <int> IsGte(CompareParamTestSpec <int> spec)
 {
     return(Ensure.That(spec.Value, ParamName).IsGte(spec.Limit));
 }