/**
 * Sorts an array of items by a specified key or iterating function without mutating the input array.
 *
 * @example
 * sortBy([{ age: 30 }, { age: 20 }], 'age') // [{ age: 20 }, { age: 30 }]
 * sortBy([3, 1, 2], (x) => x, 'desc') // [3, 2, 1]
 */
export declare function sortBy<T>(array: readonly T[], iteratees: keyof T | ((item: T) => any), order?: "asc" | "desc"): T[];