public List<Path> getExtraFilesDirectories() {
    return extraFilesDirectories == null
        ? null
        : extraFilesDirectories.stream().map(File::toPath).collect(Collectors.toList());
  }
public List < Path > getExtraFilesDirectories ( ) { return extraFilesDirectories == null ? null : extraFilesDirectories . stream ( ) . map ( File :: toPath ) . collect ( Collectors . toList ( ) ) ; }
Returns a nullable list of Path to user configured extra files directories.