@Nullable
    private static Language guessPageLanguage(@NotNull ColorSettingsPage page) {
      for (Language language : Language.getRegisteredLanguages()) {
        if (page instanceof RainbowColorSettingsPage && language.is(((RainbowColorSettingsPage)page).getLanguage()) ||
            page.getDisplayName().equals(language.getDisplayName())) {
          return language;
        }
      }
      return null;
    }
@Nullable
    private static Language guessPageLanguage(@NotNull ColorSettingsPage page)