has_screen
  
  Description:
  [ 
Version ( since = 
"2.2" ) ]
public bool has_screen ()
  
    Checks whether there is a Screen is associated with this widget.
     All toplevel widgets have an associated screen, and all widgets added into a hierarchy with a toplevel window at the top.
    Parameters:
    
    Returns:
    
      
        | true if there is a Screen associated  with the 
            widget. |