anchor.diff:    We don't have a gigantic factory class to maintain.
     Both `Car` and consumer simply ask for what they need and the `Injector` delivers.
   
  -  This is what a **Dependency InjectionFramework** is all about. 
  +  This is what a **Dependency Injection Framework** is all about. 
   
     Now that we know what Dependency Injection is and appreciate its benefits, 
     let's see how it is implemented in Angular.
  
positive.code:   We'll begin with a simplified version of the `HeroesComponent` 
    that we built in the [The Tour of Heroes](../tutorial/).
    ```
    import {Component} from 'angular2/angular2';
    import {Hero} from './hero';
    import {HEROES} from './mock-heroes';
    
  
negative.code:   That's not going to work. There is no type called `config` and we didn't register the `config` object under that name anyway.
    We'll need a little help from another Angular decorator called `@Inject`.
    ```
    import {Inject} from 'angular2/core'
    
    constructor(heroService: HeroService, @Inject('app.config') config)
    
  