connect method
connect connect to a printer vai vendorId and productId
Implementation
Future<bool?> connect(int vendorId, int productId) async {
this.vendorId = vendorId;
this.productId = productId;
Map<String, dynamic> params = {
"vendorId": vendorId,
"productId": productId
};
final bool? result = await _channel.invokeMethod('connect', params);
print('connected $result');
return result;
}