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class Charts extends StatelessWidget {const Charts();
@override
Widget build(BuildContext context) {return DefaultTabController(length: 2,
child: Scaffold(appBar: AppBar(title: const TabBar(tabs: [Tab(text: 'BTCUSD'),
Tab(text: 'ETHUSD'),
],
),
),
body: const TabBarView(children: [ChartView(key: Key('BTCUSD'),
instrumentId: 'BTCUSD',
),
ChartView(key: Key('ETHUSD'),
instrumentId: 'ETHUSD',
),
],
),
),
);
}hh
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