export type StreamKind = 'eventStream' | 'ndjson';
export declare class HttpStreamResponse {
    private _httpServer?;
    private _port?;
    private _res?;
    private _initializeState;
    private _clientConnected;
    private readonly _initializedCallbacks;
    private readonly _clientConnectedCallbacks;
    private readonly _kind;
    constructor(kind?: StreamKind);
    waitForClientConnection(): Promise<void>;
    init(): Promise<void>;
    private _createServer;
    private getRandomPort;
    private _sseStart;
    private _tryListenOnPort;
    get port(): number | undefined;
    get url(): string;
    send<T>(responseFragment: T): void;
    close(): void;
}