add mix carton

lib/domain/entities/carton.dart

@@ -32,6 +32,8 @@ class Carton {
   String userID;
   String fcsShipmentID;
   String fcsShipmentNumber;
+  String mixCartonID;
+  String mixCartonNumber;
 
   int rate;
   int weight;
@@ -134,12 +136,15 @@ class Carton {
       this.fcsShipmentNumber,
       this.cartons,
       this.packageIDs,
+      this.mixCartonID,
+      this.mixCartonNumber,
       this.isShipmentCarton = false,
       this.deliveryAddress});
 
   Map<String, dynamic> toMap() {
     List _cargoTypes = cargoTypes.map((c) => c.toMap()).toList();
     List _packages = packages?.map((c) => c.toJson())?.toList();
+    List _cartons = cartons?.map((c) => c.toMap())?.toList() ?? [];
     return {
       "id": id,
       'fcs_shipment_id': fcsShipmentID,
@@ -151,6 +156,8 @@ class Carton {
       'height': height,
       'delivery_address': deliveryAddress.toMap(),
       'carton_type': cartonType,
+      'cartons': _cartons,
+      'mix_carton_id': mixCartonID
     };
   }
 
@@ -158,7 +165,8 @@ class Carton {
     var _arrivedDate = (map['arrived_date'] as Timestamp);
     var da = map['delivery_address'];
     var _da = da != null ? DeliveryAddress.fromMap(da, da["id"]) : null;
-    var cargoTypesMaps = List<Map<String, dynamic>>.from(map['cargo_types']);
+    var cargoTypesMaps =
+        List<Map<String, dynamic>>.from(map['cargo_types'] ?? []);
     var cargoTypes =
         cargoTypesMaps.map((e) => CargoType.fromMap(e, e["id"])).toList();
     return Carton(
@@ -178,6 +186,8 @@ class Carton {
         fcsShipmentID: map['fcs_shipment_id'],
         fcsShipmentNumber: map['fcs_shipment_number'],
         isShipmentCarton: map['is_shipment_carton'],
+        mixCartonID: map['mix_carton_id'],
+        mixCartonNumber: map['mix_carton_number'],
         status: map['status'],
         packageIDs: List<String>.from(map['package_ids'] ?? []),
         deliveryAddress: _da,