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:     await tester.startGesture(const Offset(50.0, 50.0));
  
      expect(
          viewsController.motionEvents[currentViewId + 1],
          orderedEquals(<FakeMotionEvent> [
            const FakeMotionEvent(AndroidViewController.kActionDown, <int> [0], <Offset> [Offset(50.0, 50.0)]),
          ])
      );
      expect(
          numPointerDownsOnParent,
  
negative.code:     );
  
      expect(
        viewsController.views,
        unorderedEquals(<FakePlatformView>[
          new FakePlatformView(currentViewId + 1, 'webview', const Size(200.0, 100.0))
        ]),
      );
    });
  
  