anchor.diff:  /// [docs]: docs/guide/lifecycle-hooks.html#aftercontent
   /// [ex]: examples/lifecycle-hooks#after-content
   abstract class AfterContentInit {
  -  void ngAfterContentInit();
  +  ngAfterContentInit();
   }
   
   /// Implement this interface to get notified after every check of your
  
positive.code: /// [docs]: docs/guide/lifecycle-hooks.html#docheck
  /// [ex]: examples/lifecycle-hooks#docheck
  abstract class DoCheck {
    void ngDoCheck();
  }
  
  /// Implement this interface to get notified when your directive is destroyed.
  
negative.code: /// [docs]: docs/guide/lifecycle-hooks.html#ondestroy
  /// [ex]: examples/lifecycle-hooks#spy
  abstract class OnDestroy {
    ngOnDestroy();
  }
  
  /// Implement this interface to get notified when your directive's content has
  