         }
         return _removeNavigationTitleActionItemButton(at: _navigationTitleActionItems.index(before: _navigationTitleActionItems.endIndex))
     }
-    // MARK: - Selected title.
+    // MARK: - Selecte Title Item.
     public func setSelectedTitle(at index: Int, animated: Bool) {
         guard index >= _navigationTitleItems.startIndex && index < _navigationTitleItems.endIndex else {
             return

        }
        return _navigationTitleItems[_selectedTitleItemIndex]
    }
    
    public var navigationItems: [TabNavigationItem] {
        set(items) {
            for item in items {

        get { return _navigationTitleActionItems }
    }
    
    // MARK: - Add, Set, Remove Items.
    // MARK: Navigagtion Item
    
    public func addNavigationItem(_ item: TabNavigationItem) {
        _addNavigationItemView(item)
        
