initSdk method
Implementation
@override
Future<String?> initSdk(CXExporterOptions options) async {
var arguments = options.toMap();
// Remove beforeSend from arguments as it cannot be serialized
arguments.remove('beforeSend');
arguments['pluginVersion'] = PluginInfo.version;
final version = await methodChannel.invokeMethod<String>('initSdk', arguments);
// If Dart-side beforeSend callback is provided, register it
_beforeSendCallback = options.beforeSend;
_startListening();
return version;
}