toJson method
Implementation
Map<String, dynamic> toJson() => {
'operation': operation,
'key': key,
'time': time.toIso8601String(),
if (ttl != null) 'ttlMs': ttl!.inMilliseconds,
'atUs': atUs,
if (interactionId != null) 'interactionId': interactionId,
if (linkedBy != null) 'linkedBy': linkedBy,
};