anchor.diff:      </template>
     ''',
     directives: const [NgTemplateOutlet],
  -  // TODO(b/71710685): Change to `Visibility.local` to reduce code size.
  -  visibility: Visibility.all,
   )
   class TestContextChangeComponent {
     Map<String, dynamic> context = {
  
positive.code:       var testBed = new NgTestBed<TestChangeContentComponent>();
        var testFixture = await testBed.create();
        var element = testFixture.rootElement;
        DebugElement debugElement = getDebugNode(element);
        CaptureTplRefs refs = debugElement.children[0].getLocal("refs");
        await testFixture.update((TestChangeContentComponent componentInstance) {
          componentInstance.currentTplRef = refs.tplRefs.first;
        });
  
negative.code:   selector: "test-cmp",
    directives: const [NgTemplateOutlet, CaptureTplRefs],
    template: "",
  )
  class TestComponent {
    TemplateRef currentTplRef;
  