Craft\Seomatic_MetaModel::seoImage PHP Method

    public function seoImage()
    {
        $result = "";
        if (isset($this->seoImageId)) {
            $image = craft()->assets->getFileById($this->seoImageId);
            if ($image) {
                $result = $image->url;
            }
        }
        return $result;
    }