anchor.diff:  /// [docs]: docs/guide/lifecycle-hooks.html#aftercontent
   /// [ex]: examples/lifecycle-hooks#after-content
   abstract class AfterContentChecked {
  -  void ngAfterContentChecked();
  +  ngAfterContentChecked();
   }
   
   /// Implement this interface to get notified when your component's view has been
  
positive.code: /// [docs]: docs/guide/lifecycle-hooks.html#afterview
  /// [ex]: examples/lifecycle-hooks#after-view
  abstract class AfterViewChecked {
    void ngAfterViewChecked();
  }
  
negative.code: /// [docs]: docs/guide/lifecycle-hooks.html#docheck
  /// [ex]: examples/lifecycle-hooks#docheck
  abstract class DoCheck {
    ngDoCheck();
  }
  
  /// Implement this interface to get notified when your directive is destroyed.
  