/**
 * Adds redirection adding a trailing slash, when a request matches a given path.
 * @param path - The path to add a trailing slash to. E.g. '/wp-admin'
 * @returns  - Returns a middleware function that may redirect adding a trailing slash to the given path. E.g. '/wp-admin/'
 */
export declare function addTrailingSlash(path: any): (req: any, res: any, next: any) => void;