export default class TimingHelper {
    static _instance: any;
    static getInstance(): any;
    _duration: number;
    _durationStart: number;
    _onDurationUpdateCallbackMap: {};
    _timer: NodeJS.Timeout;
    startTimer(): void;
    stopTimer(): void;
    resetDuration(): void;
    _increaseDuration(): void;
    getDuration(): number;
    onDurationUpdate(callbackID: any, callback: any): void;
    notifyDurationUpdate(duration: any): Promise<void>;
}