Structural directives - Dummy directive

dummy.directive.ts

interface DummyContext {
  /* ... */
}

@Directive({
  selector: '[appDummy]'
})
export class DummyDirective {
  @Input()
  set appDummy(value: string) {
    /* ... */
  }

  constructor(private viewRef: ViewContainerRef,
              private templateRef: TemplateRef<DummyContext>) {
  }
}