renameZone method
Rename zone.
Implementation
void renameZone(String id, String name, String? region, String? billingCode, NmTelecomL10n l10n) {
final current = repository.byId(id);
if (current == null) return;
repository.replace(id, current.copyWith(name: name, region: region, billingCode: billingCode), l10n);
notifyListeners();
}