import Foundation

struct MSfo
{
    let category:String
    let parentalLevel:Int
    let title:String?
    let saveDataDetail:String?
    let saveDataDirectory:String?
    let saveDataFileList:String?
    let saveDataParams:String?
    let saveDataTitle:String?
}

import Foundation

final class MSfo
{
    
}

--- 
+++ 
@@ -1,6 +1,13 @@
 import Foundation
 
-final class MSfo
+struct MSfo
 {
-    
+    let category:String
+    let parentalLevel:Int
+    let title:String?
+    let saveDataDetail:String?
+    let saveDataDirectory:String?
+    let saveDataFileList:String?
+    let saveDataParams:String?
+    let saveDataTitle:String?
 }
Use struct instead of class
