/**
 * Appends query parameters to a given URL.
 *
 * If the URL already contains query parameters, the new parameters are appended
 * with an `&`. Otherwise, they are added starting with a `?`.
 *
 * @param {string} originalUrl - The base URL to append query parameters to.
 * @param {Record<string, string>} additionalQueryParams - Key-value pairs of query parameters to append.
 * @returns {string} The resulting URL with the appended query parameters.
 *
 * @example
 * ```ts
 * appendQueryParams('/search', { q: 'test', page: '2' });
 * // '/search?q=test&page=2'
 * ```
 */
export declare function appendQueryParams(originalUrl: string, additionalQueryParams: Record<string, string>): string;
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