getInvoice method
Implementation
Future<Invoice> getInvoice({String? invoiceId, String? number}) async {
const name = Aufrufe.getInvoice;
_genauEine(name, {'invoiceId': invoiceId, 'number': number});
final daten = await _transport.rufen(name, {'invoiceId': ?invoiceId, 'number': ?number});
return _lesen(name, () => Invoice.fromJson(_objekt(daten, 'invoice')));
}