/**
 * node-fetch wrapper that adds the possibility to set a timeout after which
 * a custom error is returned.
 * @param  {string} url     url to pass to node-fetch
 * @param  {object} options options to pass to node-fetch
 * @param  {number} timeout maximum acceptable timeout before considering the request as failed
 * @param  {string} error   custom error string after the timeout is expired
 * @return {Promise}
 */
export declare function fetchTimeout(url: any, options: any, timeout: any, error: any): Promise<any>;
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