requestMamMessages method
Implementation
Future<void> requestMamMessages(String userJid, String requestSince, String requestBefore, String limit) async {
print(" Plugin : User Jid : $userJid , Request since : $requestSince , Request Before : $requestBefore, Limit : $limit ");
final params = {"userJid": userJid, "requestBefore": requestBefore, "requestSince": requestSince, "limit": limit};
await _channel.invokeMethod('request_mam', params);
}