Method constructor

packages/core/test/injector/injector.spec.ts:846–850

(
          @Inject(CatService) cat: CatService,
          dog: DogService, // no @Inject — becomes a sparse array hole without design:paramtypes
          @Inject(CatService) cat2: CatService,
        )

      @Injectable()
      class ZooService {
        constructor(
          @Inject(CatService) cat: CatService,
          dog: DogService, // no @Inject — becomes a sparse array hole without design:paramtypes
          @Inject(CatService) cat2: CatService,
        ) {}
      }

      // Simulate missing emitDecoratorMetadata (esbuild).