import { Response } from 'express';
export declare class SseResponse {
    response: Response;
    private isResponseOpen;
    private _onClose;
    constructor(response: Response);
    private setupSseHeaders;
    private setupCloseHandlers;
    send(data: object): void;
    isOpen(): boolean;
    close(): void;
    _triggerOnClose(): void;
    onClose(callback: () => void): void;
}
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