/**
 * Fetches a URL
 */
export declare class UrlFetcher {
    private localCacheDataTtl;
    private extraHeaders;
    constructor(localCacheDataTtl: any, extraHeaders: Map<string, string>);
    fetchUrl(url: string, callback: (data: {}) => void, errorCallback?: (error: any) => void): void;
    fetchUrlWithParameters(url: string, providedParameters: {}, callback: (data: {}) => void, errorCallback?: (error: any) => void): void;
}