Flutter 中怎么样优雅的实现一个错误页面？

class ErrorWidget extends StatelessWidget {
  final String errorMessage;

  ErrorWidget(this.errorMessage);

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Icon(
            Icons.error,
            color: Colors.red,
            size: 60,
          ),
          SizedBox(height: 16),
          Text(
            errorMessage,
            style: TextStyle(
              fontSize: 18,
              fontWeight: FontWeight.w500,
              color: Colors.red,
            ),
            textAlign: TextAlign.center,
          ),
        ],
      ),
    );
  }
}

if (hasError) {
  return ErrorWidget('出现错误，请重试。');
}

class ErrorHandlingWidget extends StatelessWidget {
  final Widget child;
  final Function onRetry;

  ErrorHandlingWidget({
    required this.child,
    required this.onRetry,
  });

  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
      future: someAsyncFunction(),
      builder: (BuildContext context, AsyncSnapshot snapshot) {
        if (snapshot.hasError) {
          return ErrorWidget(
            '出现错误，请重试。',
            onRetry: onRetry,
          );
        }
        return child;
      },
    );
  }
}

ErrorHandlingWidget(
  child: SomeWidget(),
  onRetry: () {
    // 处理错误的逻辑
  },
)