as keyword renaming

import {
  lastName as surname // import rename
} from './profile.js';
function v1() { ... }
function v2() { ... }
export { v1 as default };
//Equivalent to export default v1;
export {
  v1 as streamV1, // export rename
  v2 as streamV2, // export rename
  v2 as streamLatestVersion // export rename
};