/**
 * Date: 2015-10-05
 * Author: Kasper Søfren <soefritz@gmail.com> (https://github.com/kafoso)
 *
 * A truncation feature, where the ellipsis will be placed in the dead-center of the URL.
 *
 * @param {String} url             A URL.
 * @param {Number} truncateLen     The maximum length of the truncated output URL string.
 * @param {String} ellipsisChars   The characters to place within the url, e.g. "..".
 * @return {String} The truncated URL.
 */
export declare function truncateMiddle(url: string, truncateLen: number, ellipsisChars?: string): string;