/**
 * Helper function used to iterate trough models prototype chain and collect data for all parents
 *
 * @export
 * @template T
 * @template U
 * @param {U} obj Given model
 * @param {(state: T, item: U) => T} reduceFn Function used to collect the data
 * @param {T} initialValue Initial reducer data
 * @returns {T} Collected data
 */
export declare function reducePrototypeChain<T, U>(obj: U, reduceFn: (state: T, item: U) => T, initialValue: T): T;