import { Transform } from 'stream';
import IServerSentEvent from '../data/IServerSentEvent.js';
import { NodeCallback } from '../utils/node.js';
export default class ServerSentEventsSerializer extends Transform {
    private keepAliveTimer;
    constructor();
    _transform(event: IServerSentEvent, _encoding: BufferEncoding, callback: NodeCallback): void;
    private setupKeepAliveTimer;
}
//# sourceMappingURL=ServerSentEventsSerializer.d.ts.map