declare global {
    interface ReadonlyArray<T> {
        /**
         * Calls a defined callback function on each element of an array, and
         * returns a new array sorted by the extracted values
         *
         * @param valueExtractFn - A function that accepts up to three arguments.
         *  The sortBy method calls the callback function one time for each
         *  element in the array.
         *
         * @returns A new array, sorted by the result of valueExtractFn.
         */
        sortBy<V extends string | number | bigint>(valueExtractFn: (element: T, index: number, array: ReadonlyArray<T>) => V, order?: 'asc' | 'desc'): ReadonlyArray<T>;
    }
    interface Array<T> {
        /**
         * Calls a defined callback function on each element of an array, and
         * returns a new array sorted by the extracted values
         *
         * @param valueExtractFn - A function that accepts up to three arguments.
         *  The sortBy method calls the callback function one time for each
         *  element in the array.
         *
         * @returns A new array, sorted by the result of valueExtractFn.
         */
        sortBy<V extends string | number | bigint>(valueExtractFn: (element: T, index: number, array: ReadonlyArray<T>) => V, order?: 'asc' | 'desc'): Array<T>;
    }
}
export {};