assign tag dialog

lib/pages/spaces_management/space_model/models/tag_model.dart

@@ -30,6 +30,18 @@ class TagModel {
     );
   }
 
+  TagModel copyWith({
+    String? tag,
+    ProductModel? product,
+    String? location,
+  }) {
+    return TagModel(
+      tag: tag ?? this.tag,
+      product: product ?? this.product,
+      location: location ?? this.location,
+    );
+  }
+
   Map<String, dynamic> toJson() {
     return {
       'uuid': uuid,