如何使用官方的webview_flutter插件在flutter中预加载webview？

dependencies:
  flutter:
    sdk: flutter
  webview_flutter: ^2.0.0

import 'package:webview_flutter/webview_flutter.dart';

class MyWebView extends StatefulWidget {
  @override
  _MyWebViewState createState() => _MyWebViewState();
}

class _MyWebViewState extends State<MyWebView> {
  final Completer<WebViewController> _controller =
      Completer<WebViewController>();

  @override
  void initState() {
    super.initState();
    // 预加载WebView
    if (Platform.isAndroid) {
      WebView.platform = SurfaceAndroidWebView();
    }
  }

  @override
  Widget build(BuildContext context) {
    return WebView(
      initialUrl: 'https://example.com', // 预加载的URL
      onWebViewCreated: (WebViewController webViewController) {
        _controller.complete(webViewController);
      },
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('WebView Preloading'),
      ),
      body: Center(
        child: MyWebView(), // 使用预加载的WebView
      ),
    );
  }
}