code: func (v *Display) GetScreen(screenNum int) (*Screen, error) {
  	c := C.gdk_display_get_screen(v.native(), C.gint(screenNum))
  	if c == nil {
  		return nil, nilPtrErr
  	}
  
  	return &Screen{glib.Take(unsafe.Pointer(c))}, nil
  }
docs: // GetScreen() is a wrapper around gdk_display_get_screen().