/**
 * Creates an object composed of keys generated from the results of running
 * each element of collection thru iteratee.
 *
 * @param array collection to group
 * @param function iteratee to transform keys
 */
export declare function groupBy<T, U extends number | string | symbol>(collection: readonly T[], iteratee: (item: T) => U): Record<U, T[]>;
//# sourceMappingURL=index.d.ts.map