/**
 * [walk description] 遍历一个对象, 提供入栈和出栈两个回调, 操作原对象
 * @author haozi
 * @param  {object} obj          [description]
 * @param  {[type]} descentionFn [description]
 * @param  {[type]} ascentionFn  [description]
 * @return {[type]}              [description]
 */
export declare type WalkCallback = (val: any, key: string, parent: any, { _break, path }: {
    _break: any;
    path: any;
}) => void;
declare const walk: (obj?: {}, descentionFn?: WalkCallback, ascentionFn?: WalkCallback) => void;
export default walk;