private static List<File> getPluginSystemPaths() {
    return CodeFenceGeneratingProvider.collectProviders().stream()
      .filter(MarkdownCodeFenceCacheableProvider.class::isInstance)
      .map(MarkdownCodeFenceCacheableProvider.class::cast)
      .map(provider -> provider.getCacheRootPath().toFile())
      .collect(Collectors.toList());
  }
private static List<File> getPluginSystemPaths()