declare const c: {
    value<V>(): ValueConfig<V>;
};
type Config<T> = {
    [P in keyof T]: ValueConfig<T[P]>;
};
declare function config<T>(object: Config<T>): void;
interface ValueConfig<V> {
    req(): ValueConfig<V>;
    readOnly(): ValueConfig<V>;
    validate(fn: (value: V) => boolean): ValueConfig<V>;
}
type Author = {
    name: string;
    address: string;
    city: string;
};