How to use the react-transition-group/Transition.default function in react-transition-group

/* eslint react/no-find-dom-node: 0 */

var _ = {
  each: require('lodash/each'),
  extend: require('lodash/extend'),
  forEach: require('lodash/forEach'),
  isEqual: require('lodash/isEqual'),
  keys: require('lodash/keys'),
  omit: require('lodash/omit'),
  map: require('lodash/map'),
};
var React = require('react');
var ReactDOM = require('react-dom');
var PropTypes = require('prop-types');
var TransitionGroup = require('react-transition-group/TransitionGroup');
var Transition = require('react-transition-group/Transition').default;
var Velocity = require('./lib/velocity-animate-shim');

// Shim requestAnimationFrame for browsers that don't support it, in particular IE 9.
var shimRequestAnimationFrame =
  typeof window !== 'undefined' &&
  (window.requestAnimationFrame ||
    window.webkitRequestAnimationFrame ||
    window.mozRequestAnimationFrame ||
    function(callback) {
      window.setTimeout(callback, 0);
    });

// Fix 'Invalid calling object' error in IE
shimRequestAnimationFrame =
  typeof window !== 'undefined' && shimRequestAnimationFrame.bind(window);