text: import React, { Component, PropTypes } from 'react';
  
  export default class App extends Component {
    static propTypes = {
      children: PropTypes.element.isRequired
    };
  
    render() {
      return (
        <div>
          {this.props.children}
          {
            (() => {
              //if (process.env.NODE_ENV !== 'production') {
                //const DevTools = require('./DevTools');
                //return <DevTools />;
              //}
            })()
          }
        </div>
      );
    }
  }
  