interface ObjectConstructor {
  hasOwn(object: object, key: PropertyKey): boolean;
}

interface Array<T> {
  findLast(callbackfn: (value: T, index: number, target: Array<T>) => boolean, thisArg?: any): T;
  findLastIndex(callbackfn: (value: T, index: number, target: Array<T>) => boolean, thisArg?: any): number;
}

interface TypedArray {
  findLast(callbackfn: (value: any, index: number, target: ) => boolean, thisArg?: any): any;
  findLastIndex(callbackfn: (value: any, index: number, target: ) => boolean, thisArg?: any): number;
}

interface Array<T> {
  flat(depthArg: number): Array<T>;
  flatMap<U>(
    mapFn: (value: T, index: number, target: Array<T>) => U | Array<U>,
    thisArg: any
  ): Array<U>;
}

interface Array<T> {
  includes(searchElement: T, from?: number): boolean;
}

interface TypedArray {
  includes(searchElement: number, from?: number): boolean;
}

interface Object {
  iterateKeys(object: { [k: PropertyKey]: any }): Iterator<string>;
  iterateValues<T>(object: { [k: PropertyKey]: T }): Iterator<T>;
  iterateEntries<T>(object: { [k: PropertyKey]: T }): Iterator<[string, T]>;
}