customCashier method Null safety
*customCashier
If you can open the cashiers that is not elgin, you can set the configurations and open
Implementation
Future<int> customCashier(int pin, int it, int dp) async {
Map<String, dynamic> mapParam = new Map();
mapParam['pin'] = pin;
mapParam['it'] = it;
mapParam['dp'] = dp;
return await platform?.invokeMethod("customCashier", {'cashierArgs': mapParam});
}