Function ref

packages/react-aria/test/utils/useObjectRef.test.js:157–164

(_ref)

    const nullHandler = jest.fn();

    function ref(_ref) {
      if (_ref) {
        setup();
      } else {
        nullHandler();
      }
      return cleanUp;
    }

    const TextField = React.forwardRef((props, forwardedRef) => {
      const ref = useObjectRef(forwardedRef);