anchor.diff:                    removeTop: true,
                     child: Builder(
                       builder: (context) {
  -                      return CustomScrollView(
  -                        key: PageStorageKey(ObjectKey(tabSliver)),
  -                        slivers: [
  -                          SliverOverlapInjector(
  -                            handle:
  +                      return DecoratedBox(
  +                        decoration: BoxDecoration(
  +                          color: Theme.of(context).colorScheme.background,
  +                        ),
  +                        child: Padding(
  +                          padding: EdgeInsets.only(
  +                            top:
                                   NestedScrollView.sliverOverlapAbsorberHandleFor(
                                 context,
  -                            ),
  +                            ).layoutExtent!,
                             ),
  -                          tabSliver,
  -                        ],
  +                          child: tabSliver,
  +                        ),
                         );
                       },
                     ),
  
positive.code:                         ),
                          Container(
                            height: 46,
                            color: Theme.of(context).colorScheme.primary,
                          ),
                        ],
                      ),
  
negative.code:                                     height: 60,
                                      width: MediaQuery.of(context).size.width,
                                      decoration: BoxDecoration(
                                        color: Theme.of(context)
                                            .colorScheme
                                            .background,
                                      ),
                                    ),
                                  ),
  