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