code: func ColorChooserDialogNew(title string, parent *Window) (*ColorChooserDialog, error) {
  	cstr := C.CString(title)
  	defer C.free(unsafe.Pointer(cstr))
  	c := C.gtk_color_chooser_dialog_new((*C.gchar)(cstr), parent.native())
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	return wrapColorChooserDialog(glib.Take(unsafe.Pointer(c))), nil
  }
docs: // ColorChooserDialogNew() is a wrapper around gtk_color_chooser_dialog_new().