export declare const HKMetricPrefix: {
    readonly None: 0;
    readonly Femto: 13;
    readonly Pico: 1;
    readonly Nano: 2;
    readonly Micro: 3;
    readonly Milli: 4;
    readonly Centi: 5;
    readonly Deci: 6;
    readonly Deca: 7;
    readonly Hecto: 8;
    readonly Kilo: 9;
    readonly Mega: 10;
    readonly Giga: 11;
    readonly Tera: 12;
};
export type HKMetricPrefix = typeof HKMetricPrefix[keyof typeof HKMetricPrefix];
