how to add addJavaScriptChannel?

[JemmyWang94]

how to add addJavaScriptChannel?
such as webview_flutter
Future addJavaScriptChannel(
String name, {
required void Function(JavaScriptMessage) onMessageReceived,
}) {
assert(name.isNotEmpty);
return platform.addJavaScriptChannel(JavaScriptChannelParams(
name: name,
onMessageReceived: onMessageReceived,
));
}

[cjltgb520]

I have the same question, have you solved it?