anchor.diff:  
   We also add a few positioning style rules for the `paper-icon-button`.
   
  -==== Dynamic toolbar shadow
  +==== Dynamic Toolbar Shadow
   
   To make the toolbar look better, we make the application toolbar to have a shadow that is shown only for the hero detail view, but not for the heroes list view. For this purpose we bind the `raised` class of the `<app-toolbar>` to `isInChildView` property and add a style rule which applies the shadow mixin from `paper-styles` to the `<app-toolbar>` when it has the `raised` class.
   
  -== Wrap-up
  +== Wrap Up
   
   All the tutorial steps are complete. Now you can use all powers of Polymer elements in your Angular 2 applications and know how to do it.
   
   TODO: Link the resulting application code repository in this section when it gets published.
   
  -=== Next steps
  +=== Next Steps
   
   There are several ways of improvement for our application. For example, you might want to add an explicit “Save” button to the hero detail editor and make the user able to intentionally submit or discard their changes. To do that, use the `ngForm` directive. See the https://angular.io/docs/ts/latest/guide/forms.html[Forms Chapter] in the Angular 2 Basics guide for the detailed instructions.
   
  
positive.code: . `Vaadin DatePicker`, as well as native HTML5 `<input type="date">`, gives the date value as an ISO-formatted `string`. To keep the simplicity, in our application we also store dates as strings, avoiding conversions.
  ====
  
  === Mock heroes data
  
  Add `app/mock-heroes.ts` file with some heroes data:
  
  
negative.code: ====
  
  [IMPORTANT]
  .PolymerElement Directives
  ====
  In order to enable all features of Polymer elements used inside your Angular component templates, remember to import `PolymerElement` in the component file and add `PolymerElement('element-name')` line for each Polymer element you use to the `directives` array of your component metadata.
  ====
  
  == List Heroes with Vaadin Grid
  
  In the previous step we added the application layout with `app-layout` elements. Next we are going add actual application content. Our plan is to use Vaadin Grid to list Heroes.
  
  [NOTE]
  .Some Parts are Explained in the Tour of Heroes
  ====
  This step partly follows the Angular 2 Tour of Heroes Tutorial. Therefore here we skip explaining the parts of the code that are similar in both this tutorial and the Tour of Heroes, like the `Hero` class and the `HeroService`.
  
  See https://angular.io/docs/ts/latest/tutorial/[Tour of Heroes] for the detailed explainations of these parts.
  ====
  
  === Hero Class
  
  Let us start with creating the `Hero` class. Add `app/hero.ts` file with the following contents:
  
  