/**
 * A [wkhtmltopdf](https://wkhtmltopdf.org) wrapper for AWS Lambda.
 * @param {string} html the html content
 * @param {any} options available at [wkhtmltopdf's website](https://wkhtmltopdf.org/docs.html)
 * @param {string} rootDir rootDir to use instead of the default one to locate `wkhtmltopdf`
 */
export declare function html2PDF(html: string, options: any, rootDir?: string): Promise<any>;