/**
 * A Branded type. Make sure that type `T` does not include
 * a `_tag` key as it is used as the branding tag.
 */
export declare type Branded<T, Brand extends string> = T & {
    _tag: Brand;
};
export interface BrandingHelper<Brand extends string> {
    brand: <T extends object>(item: T) => Branded<T, Brand>;
    isBrand: <T>(item: T) => item is Branded<T, Brand>;
}
export declare const makeBranding: <Brand extends string>(brand: Brand) => BrandingHelper<Brand>;