docs: private SymlinkResult getSymlinkBase(final String base, final Path file) throws IOException {
          int nameCount = file.getNameCount();
          Path root = fileSystem.getPath(base);
          int rootCount = root.getNameCount();
          Path f = file;
          for (int i = nameCount - 1; i>=0; i--) {
              if (Files.isSymbolicLink(f)) {
                  return new SymlinkResult(i+1 > rootCount, f);
              }
              f = f.getParent();
          }
  
          return null;
      }