/** @dynamic */
export declare const Sleep: (ms?: number) => Promise<unknown>;
/** @dynamic */
export declare class StopWatch {
    private startTimeMillis;
    private totalTimeMillis;
    constructor();
    static StartNew(): StopWatch;
    Reset(): void;
    Start(): void;
    Stop(): string;
    get Elapsed(): string;
    get ElapsedMilliseconds(): number;
    /**
     * Convert milliseconds to time string (hh:mm:ss:mss).
     * @param  milliseconds Number
     * @return String
     */
    TimeSpan: (milliseconds: number) => string;
}