import { Response as ExpressResponse } from 'express';
import { EventData } from './EventBuilder';
export declare type Response = Pick<ExpressResponse, 'write' | 'end'>;
export default class SseProvider {
    #private;
    constructor(res: Response);
    send: <E>(data: string | EventData<E>) => void;
    /**
     * write empty comment
     */
    keepAlive: () => void;
    close: () => void;
}