public function urlsForAttachment($attachmentName)
    {
        $urls = [];

        if (isset($this->attachedFiles[ $attachmentName ])) {
            $attachment = $this->attachedFiles[ $attachmentName ];

            foreach ($attachment->variants(true) as $variant) {
                $urls[ $variant ] = $attachment->url($variant);
            }
        }

        return $urls;
    }