How to use the react-desc.PropTypes.instanceOf function in react-desc

export default (function (Tabs) {
  var DocumentedTabs = describe(Tabs).availableAt(getAvailableAtBadge('Tabs')).description('A tabular view component.').usage('import { Tabs, Tab } from \'grommet\';\n\n  ...\n  ...\n');

  DocumentedTabs.propTypes = {
    activeIndex: PropTypes.number.description('Active tab index. If specified, Tabs will be a controlled component. This means that future\ntab changes will not work unless you subscribe to onActive function and update activeIndex\naccordingly.'),
    children: PropTypes.arrayOf(PropTypes.instanceOf(Tab)).description('Array of Tab.').isRequired,
    justify: PropTypes.oneOf(['start', 'center', 'end']).description('How to align the tabs along the main axis.').defaultValue('center'),
    messages: PropTypes.shape({
      tabContents: PropTypes.string
    }).description('Custom messages for Tabs. Used for accessibility by screen readers.').defaultValue({
      tabContents: 'Tab Contents'
    }),
    onActive: PropTypes.func.description('Function that will be called with the active tab index when the currently active\ntab changes.')
  };
  return DocumentedTabs;
});

bounds: PropTypes.arrayOf(PropTypes.string)
      .description(`An array of two numbers indicating the limits on
        navigation in ISO8601 format`),
    disabledDates: PropTypes.arrayOf(PropTypes.oneOfType([
      PropTypes.string,
      PropTypes.arrayOf(PropTypes.string),
    ]))
      .description(`Multiple dates in ISO8601 format that should not be
        selectable. Items that are an array indicate a range of dates.`),
    firstDayOfWeek: PropTypes.oneOf([0, 1])
      .description('The first day of the week. 0 for Sunday. 1 for Monday.'),
    locale: PropTypes.string.description('The locale to use.'),
    size: PropTypes.oneOf(['small', 'medium', 'large'])
      .description('Size of the calendar drop.'),
    value: PropTypes.oneOfType([
      PropTypes.instanceOf(Date),
      PropTypes.string,
    ]).description('The date value is Date format of ISO string'),
  };

  return DocumentedElement;
};