static @NotNull OptionController rootController(@NotNull PsiElement context) {
    return OptionController.empty().onPrefixes(prefix -> {
      OptionControllerProvider provider = EP_NAME.getByKey(prefix, OptionControllerProvider.class, OptionControllerProvider::name);
      return provider == null ? null : provider.forContext(context);
    });
  }
static @NotNull OptionController rootController(@NotNull PsiElement context)