sendBroadcastMessage method
Implementation
Future<Map<dynamic, dynamic>> sendBroadcastMessage(
String roomID, String message) async {
ZegoFlutterEngine.instance.sendBroadcastMessage(roomID, message);
final Map<dynamic, dynamic> map = {};
map["errorCode"] = 0;
map["messageID"] = 0;
return Future.value(map);
}