/**
 * 在树中查找符合条件的项
 * @param arr
 * @param predicate
 * @param childrenKey
 * @returns
 */
export declare const find: <T extends Record<string, any>>(arr: T[], predicate: (item: T) => boolean, childrenKey?: string) => T | null;
export declare const filter: <T extends Record<string, any>>(arr: T[], predicate: (item: T) => boolean, childrenKey?: string) => T[];
/**
 * 遍历树结构
 * @param arr
 * @param callbacFn
 * @param childrenKey
 */
export declare const forEach: <T extends Record<string, any>>(arr: T[], callbacFn: (item: T) => boolean | void, childrenKey?: keyof T) => void;