@Override
      public @NotNull Set<FileIncludeProvider> calculateSubIndexer(@NotNull IndexedFile file) {
        return
          FileIncludeProvider
            .EP_NAME
            .getExtensionList()
            .stream()
            .filter(provider -> provider.acceptFile(file.getFile()))
            .collect(Collectors.toSet());
      }
@Override
      public @NotNull Set<FileIncludeProvider> calculateSubIndexer(@NotNull IndexedFile file)