How to use the terra-base.intlShape.isRequired function in terra-base

import IconLeft from 'terra-icon/lib/icon/IconLeft';
import ContentContainer from 'terra-content-container';
import IconClose from 'terra-icon/lib/icon/IconClose';
import Arrange from 'terra-arrange';
import classNames from 'classnames/bind';
import 'terra-base/lib/baseStyles';
import MenuUtils from './_MenuUtils';
import styles from './Menu.module.scss';

const cx = classNames.bind(styles);

const propTypes = {
  /**
   * The intl object to be injected for translations. Provided by the injectIntl function.
   */
  intl: intlShape.isRequired,
  /**
   * Title the should be displayed in header.
   */
  title: PropTypes.string,
  /**
   * Callback function for when back button is clicked.
   */
  onRequestBack: PropTypes.func,
  /**
   * Callback function for when close button is clicked.
   */
  onRequestClose: PropTypes.func,
  /**
   * Callback function that takes the content to be displayed next and is called when an item with nested content is clicked.
   */
  onRequestNext: PropTypes.func.isRequired,