/** Namespace that comprises various utils (also cleans up documentation). */
declare namespace fetch {
    interface FetchTransform<T> {
        (data: any): T | undefined;
    }
    /**
     * Creates a promise for an asynchronous xml/http request on a given URL. If an URL is fetched successfully, the
     * promise is resolved with the fetched data.
     * @param url - Uniform resource locator string referencing a file.
     * @param type - Request response type.
     * @returns - A promise that resolves on a parsed object if successful.
     */
    function fetchAsync<T>(url: string, type: XMLHttpRequestResponseType): Promise<T>;
    /**
     * Creates a promise for an asynchronous xml/http request on a given URL. If an URL is fetched successfully, the
     * promise is resolved with a parsed JSON object. An error code and message can be caught otherwise.
     * @param url - Uniform resource locator string referencing a JSON file.
     * @param transform - Callback to a function that transforms the fetched data into an instance of targeted type.
     * @param schema - Optional schema, that if specified, is used to validate the fetched json data.
     * @returns - A promise that resolves on a parsed JSON object if successful.
     */
    function fetchJsonAsync<T>(url: string, transform: FetchTransform<T>, schema?: any): Promise<T>;
}
export = fetch;