kind property
Kind is the judged entity's type, echoed from the event that was named. With Subject and At it is how a caller joins this answer back onto the training row or the decision it asked about.
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? kind;