declare const _default: {
    flatArr: <T>(arr: (T | T[])[], deep?: number) => T[];
    realArr: <T_1>(arr: T_1[]) => T_1[];
    proxyArr: <T_2>(arr: T_2[]) => T_2[];
    proxyArrAll: <T_3>(arr: T_3[]) => T_3[];
    listToString: (list?: any[], key?: string, split?: string, holder?: string) => string | any[];
    listGroupByKey: <T_4>(arr: T_4[], key: keyof T_4, isList?: boolean) => T_4[] | import("./list-group-key").GroupedObject<T_4>;
    dedupe: <T_5>(array: T_5[], key: keyof T_5) => T_5[];
};
export default _default;