export declare class GrpcWebRtcLoopbackBiDiSession {
    private static OFFER_OPTIONS;
    private rtcServerConnection?;
    private rtcClientConnection?;
    private loopbackRecordStream?;
    private loopbackPlaybackStream?;
    startSession(inputStream: MediaStream, outputStream: MediaStream): Promise<this>;
    getRecorderLoopBackStream(): MediaStream;
    getPlaybackLoopbackStream(): MediaStream;
}