/**
 * 给对象数组按指定键值分组
 * @example
 * let arr = [{type:'a'}, {type:'a'}, {type:'b'}]
 * groupArray(arr) // => {a:[{type:'a'},{type:'a'}], b:[{type:'b'}]}
 */
export declare function groupArray<T>(arr: T[], key: string): {
    [group: string]: T[];
};
//# sourceMappingURL=groupArray.d.ts.map