import fetch from 'node-fetch';
import { ReadableStream } from 'web-streams-polyfill/ponyfill';
import BaseFES from './base';
declare function readableStreamFromAsyncIterable(iterable: any): ReadableStream<any>;
export default class FetchEventSource extends BaseFES {
    _fetch: typeof fetch;
    _decode: (bytes: any) => string;
    _getOrigin: () => string;
    _transformStream: typeof readableStreamFromAsyncIterable;
}
export {};