     }
     
     
-    /// read files and create/add menu items
+    /// Read files recursively and add to the given menu as menu items.
+    ///
+    /// - Parameters:
+    ///   - directoryURL: The directory where to find files recursively.
+    ///   - menu: The menu to add read files.
     private func addChildFileItem(in directoryURL: URL, to menu: NSMenu) {
         
         guard let urls = try? FileManager.default.contentsOfDirectory(at: directoryURL,

    }
    
    
    /// build Script menu
    func buildScriptMenu() {
        
        assert(Thread.isMainThread)

    
    // MARK: Public Methods
    
    /// Menu for context menu.
    var contexualMenu: NSMenu? {
        
        let items = MainMenu.script.menu!.items
