/**
 * Declares common unit types
 */
export interface IUnitTag<T> {
    readonly kind: T;
}
export declare type Millisecond = number & IUnitTag<"Millisecond">;
export declare type Second = number & IUnitTag<"Second">;
export declare type Minute = number & IUnitTag<"Minute">;
export declare type Hour = number & IUnitTag<"Hour">;
export declare type Day = number & IUnitTag<"Day">;