Function is

packages/shared/objectIs.js:14–18

* inlined Object.is polyfill to avoid requiring consumers ship their own * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is

(x: any, y: any)

 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
 */
function is(x: any, y: any) {
  return (
    (x === y && (x !== 0 || 1 / x === 1 / y)) || (x !== x && y !== y) // eslint-disable-line no-self-compare
  );
}

const objectIs: (x: any, y: any) => boolean =
  // $FlowFixMe[method-unbinding]