export declare class CallStats {
    bytesSent: number;
    bytesReceived: number;
    currentRoundTripTime: number;
    availableOutgoingBitrate: number;
    mos: number;
    timestamp: number;
    private readonly isVideo;
    constructor(isVideo: boolean);
    toJSON(): {
        bytesSent: number;
        bytesReceived: number;
        currentRoundTripTime: number;
        availableOutgoingBitrate: number;
        mos: number;
    };
}