@ApiStatus.Internal
  public static @NotNull Path getIndexRoot() {
    String indexRootPath = getExplicitPath("index_root_path");
    if (indexRootPath == null) {
      indexRootPath = getSystemPath() + "/index";
    }
    return Paths.get(indexRootPath);
  }
@ApiStatus.Internal
  public static @NotNull Path getIndexRoot()