anchor.diff:      final FakePlatformViewsController viewsController = new FakePlatformViewsController(TargetPlatform.android);
       viewsController.registerViewType('webview');
       await tester.pumpWidget(
  -        const Align(
  -            alignment: Alignment.topLeft,
  -            child: SizedBox(
  -              width: 200.0,
  -              height: 100.0,
  -              child: AndroidView(viewType: 'webview'),
  -            )
  -        )
  +      const Align(
  +        alignment: Alignment.topLeft,
  +        child: SizedBox(
  +          width: 200.0,
  +          height: 100.0,
  +          child: AndroidView(viewType: 'webview'),
  +        ),
  +      ),
       );
   
       final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
  
positive.code: 
      expect(
        viewsController.motionEvents[currentViewId + 1],
          orderedEquals(<FakeMotionEvent> [
            const FakeMotionEvent(AndroidViewController.kActionDown, <int> [0], <Offset> [Offset(50.0, 50.0)]),
          ])
      );
      expect(
          numPointerDownsOnParent,
  
negative.code:               onPointerDown: (PointerDownEvent e) { numPointerDownsOnParent++; },
              ),
              const Positioned(
                child: SizedBox(
                  width: 200.0,
                  height: 100.0,
                  child: AndroidView(
                    viewType: 'webview',
                    hitTestBehavior: PlatformViewHitTestBehavior.opaque,
                  ),
                ),
              ),
            ],
          ),
  