unit property
Unit is what ONE clause is — "criterion", "control", "family". A count without its unit is not a fact, so it travels with every number here.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? unit;