Failing to get data from Firestore after Flutter Upgrades - flutter

Question

I recently upgrade all the depencies. It required to change all my codes.
Now I face an issue to retrieve data from Firebase.
The main codes impacted are below.
BlocBuilder - cubit was replaced by bloc
BlocBuilder(
bloc: ordersBloc,
buildWhen: (previous, current) {
if (current is UpdateOrderAnalyticsState ||
current is GetOrderAnalyticsFailedState ||
current is GetOrderAnalyticsInProgressState) {
return true;
}
return false;
},
builder: (context, state) {
if (state is GetOrderAnalyticsInProgressState) {
return Shimmer.fromColors(
period: Duration(milliseconds: 800),
baseColor: Colors.grey.withOpacity(0.5),
highlightColor: CompanyColors.color[800].withOpacity(0.5),
child: ShimmerCommonMainPageSmallItem(size: size),
);
}
if (state is GetOrderAnalyticsFailedState) {
return Center(child: Text('FAILED'));
}
if (state is UpdateOrderAnalyticsState) {
orderAnalytics = state.orderAnalytics;
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Expanded(
child: ClipRRect(
borderRadius: BorderRadius.circular(5),
child: Material(
child:
InkWell(
splashColor: CompanyColors.color[700].withOpacity(0.5),
onTap: () {
HapticFeedback.heavyImpact();
Navigator.push(
context,
MaterialPageRoute(builder: (context) => InventoryPage()),
);
},
child: BackdropFilter(
filter: ImageFilter.blur(sigmaX: 5, sigmaY: 1),
child: Container(
padding: const EdgeInsets.all(10.0),
decoration: _mainthembox,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text(
'GESTION INVENTAIRE',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
style: GoogleFonts.poppins(
color: CompanyColors.color[50],
fontSize: 15,
fontWeight: FontWeight.w500,
),
),
SizedBox(
height: 5.0,
),
Container(
width: 55.0,
height: 55.0,
alignment: Alignment.center,
padding: const EdgeInsets.all(15.0),
decoration: _thembox,
child: Icon(
Icons.account_balance_outlined,
color: CompanyColors.color[50],
size: 25.0,
),
),
SizedBox(
height: 10.0,
),
],
),
),
),
),
),
),
),
CloudFirestore - documentSnapshot.data()['cancelledOrders'] was replaced by documentSnapshot.get('cancelledOrders')
class OrderAnalytics {
var cancelledOrders;
var cancelledSales;
var deliveredOrders;
var deliveredSales;
var newOrders;
var newSales;
var processedOrders;
var processedSales;
var totalOrders;
var totalSales;
OrderAnalytics({
this.cancelledOrders,
this.cancelledSales,
this.deliveredOrders,
this.deliveredSales,
this.newOrders,
this.newSales,
this.processedOrders,
this.processedSales,
this.totalOrders,
this.totalSales,
});
factory OrderAnalytics.fromFirestore(DocumentSnapshot documentSnapshot) {
return OrderAnalytics(
cancelledOrders: documentSnapshot.get('cancelledOrders'),
cancelledSales: documentSnapshot.get('cancelledSales'),
deliveredOrders: documentSnapshot.get('deliveredOrders'),
deliveredSales: documentSnapshot.get('deliveredSales'),
newOrders: documentSnapshot.get('newOrders'),
newSales: documentSnapshot.get('newSales'),
processedOrders: documentSnapshot.get('processedOrders'),
processedSales: documentSnapshot.get('processedSales'),
totalOrders: documentSnapshot.get('totalOrders'),
totalSales: documentSnapshot.get('totalSales'),
);
}
}
see below error messages