/**
 * (c) Facebook, Inc. and its affiliates. Confidential and proprietary.
 *
 * @emails oncall+recoil
 * @flow strict-local
 * @format
 */
'use strict';

type Options<K> = {
  mapKey: (K) => mixed
};
declare class MapCache<K, V> {
  _map: Map<mixed, V>,
  _keyMapper: (K) => mixed,
  constructor(options?: Options<K>): any,
  size(): number,
  has(key: K): boolean,
  get(key: K): ?V,
  set(key: K, val: V): void,
  delete(key: K): void,
  clear(): void,
}
module.exports = {
  MapCache
};