update CampaignItemModel

@@ -633,11 +633,11 @@ public class swiftApi {
         public var logo_url: String?
         public let offer_category: String?
         public var title: String?
-        public let subtitle: String?
+        public var subtitle: String?
         public let session_uuid: String?
         public let subcategory: String?
         public let is_new: Bool?
-        public let message: String?
+        public var message: String?
         public let loyaltyCampaignId: String?
         public let hasExtraFields: Bool?
         public let ccms_offer: String?
@@ -795,6 +795,24 @@ public class swiftApi {
             }
         }
 
+        public var _subtitle: String? {
+            get { // getter
+                return self.subtitle
+            }
+            set(newValue) { //setter
+                self.subtitle = newValue
+            }
+        }
+
+        public var _message: String? {
+            get { // getter
+                return self.message
+            }
+            set(newValue) { //setter
+                self.message = newValue
+            }
+        }
+
         public var _loyaltyPackageId: String? {
             get { // getter
                 return self.loyaltyPackageId