import { U27N } from "./controller.js";
import { Locale } from "./locale.js";
export declare class FetchClient implements U27N.Client {
    #private;
    constructor(options: string | FetchClient.Options);
    fetchResources(_controller: U27N, locale: Locale): Promise<void>;
    clearCache(): void;
}
export declare namespace FetchClient {
    class RequestError extends Error {
        readonly response: Response;
        constructor(response: Response);
    }
    interface Options {
        url?: string;
        cache?: boolean;
    }
}