public function toArray()
    {
        return [
            'level' => $this->level,
            'subject' => $this->subject,
            'greeting' => $this->greeting,
            'salutation' => $this->salutation,
            'introLines' => $this->introLines,
            'outroLines' => $this->outroLines,
            'actionText' => $this->actionText,
            'actionUrl' => $this->actionUrl,
        ];
    }