Interface Result<T>

@Controller()
export class ExampleController {

  @Get('/')
  index() {
    return Result([
      new Header('ETag', '"foobar"'),
      new Json()
    ], { foo: 'bar' });
  }
}

// equivalent to

@Controller()
export class ExampleController {

  @Get('/')
  @Header('ETag', '"foobar"')
  @Json()
  index() {
    return { foo: 'bar' };
  }
}