old_contents: import React from 'react';
  import invariant from 'invariant';
  import { createRouteFromReactElement } from './RouteUtils';
  import { component, components } from './PropTypes';
  
  var { string, bool, func } = React.PropTypes;
  
  /**
   * A <Route> is used to declare which components are rendered to the page when
   * the URL matches a given pattern.
   *
   * Routes are arranged in a nested tree structure. When a new URL is requested,
   * the tree is searched depth-first to find a route whose path matches the URL.
   * When one is found, all routes in the tree that lead to it are considered
   * "active" and their components are rendered into the DOM, nested in the same
   * order as they are in the tree.
   */
  export var Route = React.createClass({
  
    statics: {
  
      createRouteFromReactElement(element) {
        var route = createRouteFromReactElement(element);
  
        if (route.handler) {
          warning(false, '<Route handler> is deprecated, use <Route component> instead');
          route.component = route.handler;
          delete route.handler;
        }
  
        return route;
      }
    
    },
  
    propTypes: {
      path: string,
      ignoreScrollBehavior: bool,
      handler: component,
      component,
      components,
      getComponents: func
    },
  
    render() {
      invariant(
        false,
        '<Route> elements are for router configuration only and should not be rendered'
      );
    }
  
  });
  
  export default Route;
  
new_contents: import React from 'react';
  import invariant from 'invariant';
  import { createRouteFromReactElement } from './RouteUtils';
  import { component, components } from './PropTypes';
  import warning from 'warning';
  
  var { string, bool, func } = React.PropTypes;
  
  /**
   * A <Route> is used to declare which components are rendered to the page when
   * the URL matches a given pattern.
   *
   * Routes are arranged in a nested tree structure. When a new URL is requested,
   * the tree is searched depth-first to find a route whose path matches the URL.
   * When one is found, all routes in the tree that lead to it are considered
   * "active" and their components are rendered into the DOM, nested in the same
   * order as they are in the tree.
   */
  export var Route = React.createClass({
  
    statics: {
  
      createRouteFromReactElement(element) {
        var route = createRouteFromReactElement(element);
  
        if (route.handler) {
          warning(false, '<Route handler> is deprecated, use <Route component> instead');
          route.component = route.handler;
          delete route.handler;
        }
  
        return route;
      }
    
    },
  
    propTypes: {
      path: string,
      ignoreScrollBehavior: bool,
      handler: component,
      component,
      components,
      getComponents: func
    },
  
    render() {
      invariant(
        false,
        '<Route> elements are for router configuration only and should not be rendered'
      );
    }
  
  });
  
  export default Route;
  
subject: Update Route.js