public static final String USER_PROPERTY = "D";
        public static final String SHOW_VERSION_AND_EXIT = "v";
        public static final String SHOW_VERSION = "V";
        public static final String QUIET = "q";
        public static final String VERBOSE = "X";

        public static final String SHOW_ERRORS = "e";

        public static final String FAIL_ON_SEVERITY = "fos";

namespace checkpoint {

class TensorSliceReader;

CheckpointReader::CheckpointReader(const string& filename, TF_Status* status)
    : reader_(nullptr),
      v2_reader_(nullptr),
      var_to_shape_map_(nullptr),
      var_to_data_type_map_(nullptr) {
  // Depending on whether this is a V2 ckpt, initializes "reader_" or
  // "v2_reader_".
  std::vector<string> v2_path;
  if (Env::Default()->GetMatchingPaths(MetaFilename(filename), &v2_path).ok() &&

    private void writeLastUpdated(File touchfile, String key, String error) {
        HashMap<String, String> update = new HashMap<>();
        update.put(key, Long.toString(System.currentTimeMillis()));
        update.put(key + ERROR_KEY_SUFFIX, error); // error==null => remove mapping
        trackingFileManager.update(touchfile, update);
    }

    Date readLastUpdated(File touchfile, String key) {

  }

  private Multimap<String, Integer> createMultimap() {
    Multimap<String, Integer> unfiltered = HashMultimap.create();
    unfiltered.put("zero", 55556);
    unfiltered.put("one", 55556);
    unfiltered.put("badkey", 1);
    return Multimaps.filterEntries(unfiltered, PREDICATE);
  }

  @Override
  protected Map<String, Collection<Integer>> makeEmptyMap() {
    Multimap<String, Integer> multimap = createMultimap();

    }

    @Override
    public String asTableDbName() {
        return "group";
    }

    // ===================================================================================
    //                                                                              Source
    //                                                                              ======
    @Override
    public Map<String, Object> toSource() {

                  private final Comparator<String> comparator = NullsBeforeTwo.INSTANCE;

                  @Override
                  protected SortedMap<String, String> create(Entry<String, String>[] entries) {
                    SortedMap<String, String> map = new SafeTreeMap<>(comparator);
                    for (Entry<String, String> entry : entries) {

        return mergedItem;
    }

    /**
     * Merges readings at a specific index from two reading arrays.
     */
    private static String[] mergeReadings(final String[][] readings1, final String[][] readings2, final int index) {
        final List<String> merged = new ArrayList<>();

        if (readings1.length > index && readings1[index] != null) {
            Collections.addAll(merged, readings1[index]);

            }, errorHook);
        }
    }

    /**
     * Encodes permission strings into an array.
     *
     * @param permissionsText the permissions text (newline-separated)
     * @return encoded permission array
     */
    protected static String[] encodePermissions(final String permissionsText) {

  private static final Integer N4 = 4;
  private static final String E12 = "1-2";
  private static final String E12_A = "1-2a";
  private static final String E21 = "2-1";
  private static final String E13 = "1-3";
  private static final String E44 = "4-4";

  // Test for EndpointPair class

  @Test
  public void testOrderedEndpointPair() {
    EndpointPair<String> ordered = EndpointPair.ordered("source", "target");

  private static final Integer N4 = 4;
  private static final String E12 = "1-2";
  private static final String E12_A = "1-2a";
  private static final String E21 = "2-1";
  private static final String E13 = "1-3";
  private static final String E44 = "4-4";

  // Test for EndpointPair class

  @Test
  public void testOrderedEndpointPair() {
    EndpointPair<String> ordered = EndpointPair.ordered("source", "target");