GtkTearoffMenuItem: GtkTearoffMenuItem
Description
A menu item used to tear off and reattach its menuHierarchy
\link{GObject}
   +----\link{GtkObject}
         +----\link{GtkWidget}
               +----\link{GtkContainer}
                     +----\link{GtkBin}
                           +----\link{GtkItem}
                                 +----\link{GtkMenuItem}
                                       +----GtkTearoffMenuItemInterfaces
GtkTearoffMenuItem implements
 AtkImplementorIface.Detailed Description
A GtkTearoffMenuItem is a special GtkMenuItem which is used to
tear off and reattach its menu.
  
When its menu is shown normally, the GtkTearoffMenuItem is drawn as a 
dotted line indicating that the menu can be torn off.  Activating it 
causes its menu to be torn off and displayed in its own window 
as a tearoff menu.
  
When its menu is shown as a tearoff menu, the GtkTearoffMenuItem is drawn
as a dotted line which has a left pointing arrow graphic indicating that
the tearoff menu can be reattached.  Activating it will erase the tearoff 
menu window.References
http://developer.gnome.org/doc/API/2.0/gtk/GtkTearoffMenuItem.html