export default class Duration {
    private readonly millis;
    constructor(millis?: number);
    getMillis(): any;
    getSeconds(): number;
    getMinutes(): number;
    getHours(): number;
    getDays(): number;
    static ofMillis(millis: number): Duration;
    static ofSeconds(seconds: number): Duration;
    static ofMinutes(minutes: number): Duration;
    static ofHours(hours: number): Duration;
    static ofDays(days: number): Duration;
    static parse(str: string | number): Duration;
    fmt2cn(): string;
    fmt2en(): string;
}