public function resetAllInvoiceOptions(): Client
    {
        $this->sendInvoiceByPost = null;
        $this->invoiceMaturityDays = null;
        $this->stopServiceDue = null;
        $this->stopServiceDueDays = null;
        // TODO: Add 'Late fee delay' to list of resets when made available!

        /** @var Client $this */
        return $this;
    }