Set property:scale will make 'transformer' not work.

[SixSheeppp]

 Swiper(
           loop: true,
           transformer:  BannerItemTransformer(),
           scale: 0.8,
           itemBuilder: (BuildContext context, int index) {
             return ImageView(
               url: (entity == null || entity.data == null) ? null : entity.data[index].img,
               width: screenWidth,
               height: ratio * screenWidth,
             );
           },
           itemCount: (entity == null || entity.data == null) ? 1 : entity.data.length,
           viewportFraction: 0.9,
           autoplay: !(entity == null || entity.data == null),
           autoplayDelay: 3000,
         )

When i set scale in Swipe ,the transformer will not work.

So i found these in source code.

  PageTransformer transformer = widget.transformer;
      if (widget.scale != null || widget.fade != null) {
        transformer =
            new ScaleAndFadeTransformer(scale: widget.scale, fade: widget.fade);
      }

I think docs or assets may make it clear?