/// <summary>
 /// Adds the MenuItems in a MenuItemCollection.
 /// </summary>
 /// <param name="items">The MenuItemCollection instance whose MenuItems to add.</param>
 public virtual void AddRange(ExtjsTabPageCollection items)
 {
     tabPages.AddRange(items);
 }
 /// <summary>
 /// Adds the MenuItems in a MenuItemCollection.
 /// </summary>
 /// <param name="items">The MenuItemCollection instance whose MenuItems to add.</param>
 public virtual void AddRange(ExtjsTabPageCollection items)
 {
     tabPages.AddRange(items);
 }