private PlanFeature(PlanFeatureId id, string name, Feature feature, IImmutableList <MeasurementSet> measurementSets)
{
Id = id;
Name = name;
Feature = feature;
MeasurementSets = measurementSets;
}
public MeasurementSet(PlanFeatureId planFeatureId, Feature feature, int minimumPoints, int maximumPoints)
{
Id = new MeasurementSetId();
PlanFeatureId = planFeatureId;
MinimumPoints = minimumPoints;
MaximumPoints = maximumPoints;
MeasurementSetKey = new MeasurementSetKey(feature, this);
}