type PropertyName = string | number | symbol;
type Iteratee<T, R> = ((value: T) => R) | PropertyName | [PropertyName, any] | Partial<T>;
/**
 * This method is like `sortedIndex` except that it accepts `iteratee`
 * which is invoked for `value` and each element of `array` to compute their
 * sort ranking. The iteratee is invoked with one argument: (value).
 *
 * @param {ArrayLike<T> | null | undefined} array The sorted array to inspect.
 * @param {T} value The value to evaluate.
 * @param {(value: T) => R | PropertyName | [PropertyName, any] | Partial<T>} iteratee The iteratee invoked per element.
 * @returns {number} Returns the index at which `value` should be inserted
 *  into `array`.
 * @example
 * const objects = [{ 'n': 4 }, { 'n': 5 }]
 * sortedIndexBy(objects, { 'n': 4 }, ({ n }) => n)
 * // => 0
 */
declare function sortedIndexBy<T, R>(array: ArrayLike<T> | null | undefined, value: T, iteratee?: Iteratee<T, R>, retHighest?: boolean): number;

export { sortedIndexBy };