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