interface IterableIterator<T> {}
interface Iterable<T> {}

interface Map<K, V> {
  clear(): void;
  delete(key: K): boolean;
  forEach(callbackfn: (value: V, index: K, map: Map<K, V>) => void, thisArg?: any): void;
  get(key: K): V;
  has(key: K): boolean;
  set(key: K, value?: V): Map<K, V>;
  size: number;
}

interface MapConstructor {
  new <K, V>(): Map<K, V>;
  prototype: Map<any, any>;
}
declare var Map: MapConstructor;