Add support for async/future

Any plan to add support for async calls, or perhaps FutureBuilder?

Suppose I am getting a list of images from an api with 
Future<List<Object>> loadData() async{
    ...
   return List<Object> data;
}

Rather than having to specify itemCount, perhaps I could simply call:

new Swiper(
  futureBuilder: (c, i){
    ....
  }
)

Is there a way to do this now?
