/**
 * Returns a canonical query string.
 *
 * @param searchParams `searchParams` from the request url.
 * @returns URL-encoded query string parameters, separated by ampersands (&). Percent-encode reserved characters,
 * including the space character. Encode names and values separately. If there are empty parameters, append the equals
 * sign to the parameter name before encoding. After encoding, sort the parameters alphabetically by key name. If there
 * is no query string, use an empty string ("").
 *
 * @internal
 */
export declare const getCanonicalQueryString: (searchParams: URLSearchParams) => string;