init method
void
init()
Implementation
void init({
required bool? isOpenMessageRoaming,
required String? appkey,
String? channel,
bool isProduction = false,
}) {
_channel.setMethodCallHandler(_handleMethod);
_channel.invokeMethod(
'setup',
{
'isOpenMessageRoaming': isOpenMessageRoaming,
'appkey': appkey,
'channel': channel,
'isProduction': isProduction
}..removeWhere((key, value) => value == null));
}