payload method
Implementation
@override
Map<String, Object?> payload() => {
'change': change.name,
if (orchestrator != null) 'orchestrator': orchestrator!.toJson(),
if (orchestration != null) 'orchestration': orchestration!.toJson(),
if (entity != null) 'entity': entity!.toJson(),
if (system != null) 'system': system!.toJson(),
if (removedId != null) 'removedId': removedId,
};