anchor.diff:          '<div>(<div *manual><ng-content select=".left"></ng-content></div>'
           ', <ng-content></ng-content>)</div>',
       directives: const [ManualViewportDirective])
  -class ConditionalContentComponent {}
  +class ConditionalContentComponent {
  +  @ViewChild(ManualViewportDirective)
  +  ManualViewportDirective manualViewportDirective;
  +}
   
   @Directive(selector: "[manual]")
   class ManualViewportDirective {
  
positive.code:         '<div class="left">A</div><div>B</div><div>C</div>'
          '</conditional-content>',
      directives: const [ConditionalContentComponent])
  class ContainerABCWithConditionalComponent {}
  
  @Component(
      selector: "conditional-content",
  
negative.code: import 'package:angular_test/angular_test.dart';
  import 'package:test/test.dart';
  import 'package:angular/angular.dart';
  import 'package:_tests/matchers.dart';
  
  import 'projection_test.template.dart' as ng_generated;
  