List<OrdersModel> _orderList = new List<OrdersModel>(); //My List of object


	Future<void> saveUserOrder() { 					// function to save data to firebase
    Firestore.instance.collection('CustomersDetail').document().setData({
      'Full Name': fullNameController.text,
      'Phone Number': phnNumberController.text,
      'Location': locationController.text,
      'Delivery Date': dateController.text,
      'Orders': _orderList // problem to be fixed
    }).catchError((onError) {
      debugPrint("An error has occured $onError");
    });
  }