if (StringUtil.isBlank(newEnc)) {
            return enc;
        }
        return newEnc;
    }

    /**
     * Sets the default encoding to use when no mapping is found.
     *
     * @param defaultEncoding the default encoding to set
     * @throws IllegalArgumentException if the default encoding is blank
     */
    public void setDefaultEncoding(final String defaultEncoding) {

        }
    }

    /**
     * Gets the new input value for this item.
     * @return the new input value
     */
    public String getNewInput() {
        return newInput;
    }

    /**
     * Sets the new input value for this item.
     * @param newInput the new input value
     */
    public void setNewInput(final String newInput) {
        this.newInput = newInput;
    }

    /**

    }

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(FessFileTransformer.class);

    /**
     * Initializes the transformer after dependency injection.
     * Sets up the Fess configuration and data serializer components.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initializing {}", this.getClass().getSimpleName());

          .put(ImmutableList.class, ImmutableList.of())
          .put(Set.class, ImmutableSet.of())
          .put(ImmutableSet.class, ImmutableSet.of())
          .put(SortedSet.class, ImmutableSortedSet.of())
          .put(ImmutableSortedSet.class, ImmutableSortedSet.of())
          .put(NavigableSet.class, Sets.unmodifiableNavigableSet(Sets.newTreeSet()))
          .put(Map.class, ImmutableMap.of())

      current.setValue(value);
    }
  }

  /** An {@code Iterator} over distinct keys in key head order. */
  private final class DistinctKeyIterator implements Iterator<K> {
    final Set<K> seenKeys = Sets.newHashSetWithExpectedSize(keySet().size());
    @Nullable Node<K, V> next = head;
    @Nullable Node<K, V> current;
    int expectedModCount = modCount;

    private void checkForConcurrentModification() {

    assertThrows(
        UnsupportedOperationException.class, () -> inverse.putAll(singletonMap("four", 4)));
    Set<String> values = unmod.values();
    assertThrows(UnsupportedOperationException.class, () -> values.remove("four"));
    Set<Entry<Number, String>> entries = unmod.entrySet();
    Entry<Number, String> entry = entries.iterator().next();

		// because many legacy ZIP readers interpret the timestamp according
		// to the local timezone.
		//
		// The timezone is only non-UTC if a user directly sets the Modified
		// field directly themselves. All other approaches sets UTC.
		fh.ModifiedDate, fh.ModifiedTime = timeToMsDosTime(fh.Modified)

		// Use "extended timestamp" format since this is what Info-ZIP uses.

            logger.error("Could not update labels.", e);
            resultBuf.append(e.getMessage()).append("\n");
        }

        return resultBuf.toString();
    }

    /**
     * Sets the query builder for filtering documents.
     *
     * @param queryBuilder the query builder to filter documents
     * @return this UpdateLabelJob instance for method chaining
     */

     *
     * @return boolean
     */
    public boolean getAddDefaultEntities() {
        return delegate.getAddDefaultEntities();
    }

    /**
     * Sets the state of the "add default entities" flag.
     *
     * @param addDefaultEntities a addDefaultEntities object.
     */
    public void setAddDefaultEntities(boolean addDefaultEntities) {

          .put(ImmutableList.class, ImmutableList.of())
          .put(Set.class, ImmutableSet.of())
          .put(ImmutableSet.class, ImmutableSet.of())
          .put(SortedSet.class, ImmutableSortedSet.of())
          .put(ImmutableSortedSet.class, ImmutableSortedSet.of())
          .put(NavigableSet.class, Sets.unmodifiableNavigableSet(Sets.newTreeSet()))
          .put(Map.class, ImmutableMap.of())