muh :(

lib/model/item.dart

@@ -1,29 +1,19 @@
 class Item {
+  int id;
+  String mime;
+  int tagId;
+  
   Item({
     required this.id,
     required this.mime,
     required this.tagId
   });
-  final int id;
-  final String mime;
-  final int tagId;
 
   factory Item.fromJson(Map<String, dynamic> data) {
-    final id = data['id'] as int;
-    final mime = data['mime'] as String;
-    final tagId = data['tag_id'] as int;
     return Item(
-      id: id,
-      mime: mime,
-      tagId: tagId
+      id: data['id'],
+      mime: data['mime'],
+      tagId: data['tag_id']
     );
   }
-
-  Map<String, dynamic> toJson() {
-    return {
-      'id': id,
-      'mime': mime,
-      'tagId': tagId
-    };
-  }
 }