    kind: "step";
    next: () => DebuggerStream;
}) & {
    show: () => DebuggerStreamStep;
};
export declare let run_stream_to_end: (s: DebuggerStream) => Immutable.List<DebuggerStreamStep>;
export declare let get_stream: (source: string, custom_alert: Sum<(_: string) => boolean, Unit>) => DebuggerStream;