anchor.diff:  
   @Directive(
     selector: 'some-directive',
  -  // TODO(b/71710685): Change to `Visibility.local` to reduce code size.
     visibility: Visibility.all,
   )
   class SomeDirective {}
  
positive.code:     NgFor,
      ToolbarViewContainer,
    ],
    // TODO(b/71710685): Change to `Visibility.local` to reduce code size.
    visibility: Visibility.all,
  )
  class ToolbarComponent {
    @ContentChildren(ToolbarPart)
  
negative.code:   directives: const [
      SomeViewport,
    ],
  )
  class TemplatePropertyComponent {}
  
  @Directive(
    selector: '[toolbarpart]',
  )
  class ToolbarPart {
    final TemplateRef templateRef;
  