export declare abstract class Time {
    abstract Now(add?: number): Date;
    abstract Sleep(duration: Duration): Promise<void>;
    TimeSince(start: Date): Duration;
}
export type Duration = number;
export declare const TimeUnits: {
    Microsecond: number;
    Second: number;
    Minute: number;
    Hour: number;
};
export type TimeUnit = keyof typeof TimeUnits;
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