endedAt property
EndedAt is when it reached done or error, same format. Empty while it is still running or paused, which is how absence reads here: not over yet.
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? endedAt;