asString method
Implementation
String? asString() => switch (this) {
IDNone() => null,
SerialNumber(serialNumber: final sn) => sn,
CAARegistrationID(registrationID: final regId) => regId,
UTMAssignedID(id: final id) => id.toHexString(),
SpecificSessionID(id: final id) => id.toHexString(),
};