annotations.java

  @Override
  public void onTaskEnd(PagedResult<List<Product>> result) {
      if (result.isSuccess()) { // isSuccess guarantees result.data is not null
          products.clear();
          products.addAll(result.data); // AS warns me that result.data might be null
          adapter.notifyDataSetChanged();
      }
      setRefreshing(false);
  }