export declare class FetchError extends Error {
    readonly response: Response | null;
    readonly cause?: unknown | undefined;
    /**
     * Has the error been handled by the application already?
     *
     * E.g. feedback has been shown to the user about it, or they have been redirected somewhere because of the error.
     */
    handled: boolean;
    constructor(url: string, response: Response | null, cause?: unknown | undefined);
}