output property
Output is what the model produced. Empty on an error run, and empty is also a legitimate answer from a run that succeeded with nothing to say — Status is what separates those.
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? output;