id property
ID identifies the event, and its shape says which kind it is: a run event carries the run's own id, while an agent event is the agent id suffixed ":created" or ":updated". Unique within a feed, and not an address — there is nothing to fetch it by.
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? id;