import type { FetchRequest, IConfigCatConfigFetcher } from "../ConfigFetcher.js";
import { fetchInternalAsyncMethodName, FetchResponse } from "../ConfigFetcher.js";
interface IHttpRequest {
    setRequestHeader(name: string, value: string): void;
}
export declare class XmlHttpRequestConfigFetcher implements IConfigCatConfigFetcher {
    private static getFactory;
    private requestRetryDelayMs;
    private readonly disposeToken;
    dispose(): void;
    fetchAsync(request: FetchRequest): Promise<FetchResponse>;
    private [fetchInternalAsyncMethodName];
    private fetchWithRetryAsync;
    private fetchCoreAsync;
    private handleStateChange;
    protected setRequestHeaders(httpRequest: IHttpRequest, headers: ReadonlyArray<readonly [string, string]>): void;
}
export {};