flutter_webview_plugin not support http proxy or socks proxy?

# I want use proxy in flutter_webview_plugin, that not provide property to set proxy!

const WebviewScaffold({
Key key,
this.appBar,
@required this.url,
this.headers,
this.javascriptChannels,
this.withJavascript,
this.clearCache,
this.clearCookies,
this.mediaPlaybackRequiresUserGesture = true,
this.enableAppScheme,
this.userAgent,
this.primary = true,
this.persistentFooterButtons,
this.bottomNavigationBar,
this.withZoom,
this.displayZoomControls,
this.withLocalStorage,
this.withLocalUrl,
this.localUrlScope,
this.withOverviewMode,
this.useWideViewPort,
this.scrollBar,
this.supportMultipleWindows,
this.appCacheEnabled,
this.hidden = false,
this.initialChild,
this.allowFileURLs,
this.resizeToAvoidBottomInset = false,
this.invalidUrlRegex,
this.geolocationEnabled,
this.debuggingEnabled = false,
this.ignoreSSLErrors = false,
}) : super(key: key);

Start at the WebviewScaffold constructor shown in the issue and trace how its options reach the native WebView. Determine whether HTTP and SOCKS proxy configuration is available on the supported platforms; done means the plugin exposes and applies a documented proxy setting.

Rédigé par le modèle d'indexation à partir du texte de l'issue.