public function addOutgoingPaymentRequest(
        string $payerNr,
        SEK $amount,
        \DateTimeInterface $date,
        string $ref,
        string $interval,
        int $repetitions
    ): void {
        $this->addPaymentRequest(
            'OutgoingPaymentRequest',
            $payerNr,
            $amount,
            $date,
            $ref,
            $interval,
            $repetitions
        );
    }