anchor.diff:        );
         preferredSize = Tween<Size>(
           begin: Size.fromHeight(kToolbarHeight),
  -        end: Size.fromHeight(kToolbarHeight + tabs.preferredSize.height),
  +        end: Size.fromHeight(kToolbarHeight + tabBar.preferredSize.height),
         ).evaluate(appBarCurve);
         final animatedAlignment = Tween<Alignment>(
           begin: Alignment.centerRight,
           end: Alignment.bottomCenter,
         ).evaluate(appBarCurve);
  +
  +      final rightEdge = isNarrow ? 0.0 : DevToolsScaffold.actionWidgetSize / 2;
         final animatedRightPadding = Tween<double>(
  -        begin:
  -            DevToolsScaffold.actionWidgetSize * (widget.actions?.length ?? 0.0),
  -        end: 0.0,
  +        begin: DevToolsScaffold.actionWidgetSize *
  +                (widget.actions?.length ?? 0.0) +
  +            rightEdge,
  +        end: rightEdge,
         ).evaluate(appBarCurve);
  +
         flexibleSpace = Align(
           alignment: animatedAlignment,
           child: Padding(
  
positive.code:             top: 4.0,
              right: animatedRightPadding,
            ),
            child: tabs,
          ),
        );
      }
  
negative.code:     const title = Text('Dart DevTools');
      Widget flexibleSpace;
      Size preferredSize;
      TabBar tabBar;
  
      if (widget.tabs.length > 1) {
        tabBar = TabBar(
          controller: _tabController,
          isScrollable: true,
          onTap: _pushScreenToLocalPageRoute,
  