Function isToHaveLast

packages/expect/src/__tests__/spyMatchers.test.ts:1071–1075

(
    returnedWith: string,
  )

  }

  function isToHaveLast(
    returnedWith: string,
  ): returnedWith is 'toHaveLastReturnedWith' {
    return returnedWith === 'toHaveLastReturnedWith';
  }
  test('works only on spies or jest.fn', () => {
    const fn = function fn() {};