export declare type DeepMergedObject<O extends {}, T = Array<O[keyof O]>> = {
    [K in keyof O]: O[K] extends unknown[] ? T[] : O[K] extends {} ? Array<DeepMergedObject<O[K], T>> : T;
};
export declare const mergeDeep: <O extends object, T>(objects: (O | null)[], predicate?: ((values: O[keyof O][]) => T) | undefined) => DeepMergedObject<O, T>;