@CheckForNull
      protected C computeNext() {
        while (merged.hasNext()) {
          C next = merged.next();
          boolean duplicate = lastValue != null && comparator.compare(next, lastValue) == 0;

          // Keep looping till we find a non-duplicate value.
          if (!duplicate) {
            lastValue = next;
            return lastValue;
          }
        }

                            BuilderProblem.Severity.WARNING,
                            "servers.server.id",
                            null,
                            "must be unique but found duplicate server with id " + server.getId());
                }
            }
        }

        List<Mirror> mirrors = settings.getMirrors();

        if (mirrors != null) {

    }

    @Override
    protected String asEsIndex() {
        return "fess_config.duplicate_host";
    }

    @Override
    public String asEsIndexType() {
        return "duplicate_host";
    }

    @Override
    public String asEsSearchType() {
        return "duplicate_host";
    }

    @Override
    public DuplicateHostDbm asDBMeta() {

// will be called for a pretty rendering of fatal errors.
func RegisterError(f func(string, error, bool) string) {
	errorFmtFunc = f
}

// uniq swaps away duplicate elements in data, returning the size of the
// unique set. data is expected to be pre-sorted, and the resulting set in
// the range [0:size] will remain in sorted order. Uniq, following a

    }

    @Override
    public Set<E> create(Object... elements) {
      Object[] duplicated = new Object[elements.length * 2];
      for (int i = 0; i < elements.length; i++) {
        duplicated[i] = elements[i];
        duplicated[i + elements.length] = elements[i];
      }
      return ((Multiset<E>) gen.create(duplicated)).elementSet();
    }

    @Override
    public E[] createArray(int length) {

labels.pathmap_pt_displaying=Displaying
labels.pathmap_pt_both=Crawling/Displaying
labels.pathmap_pt_stored=Stored URLs
labels.regular_name=Regular Name
labels.duplicate_name=Duplicate Name
labels.duplicate_host_configuration=Duplicate Host
labels.duplicate_host_title_details=Duplicate Host
labels.dashboard_title_configuration=System Configuration
labels.suggest_search_log_enabled=Suggest from Search Words

labels.pathmap_pt_displaying=Displaying
labels.pathmap_pt_both=Crawling/Displaying
labels.pathmap_pt_stored=Stored URLs
labels.regular_name=Regular Name
labels.duplicate_name=Duplicate Name
labels.duplicate_host_configuration=Duplicate Host
labels.duplicate_host_title_details=Duplicate Host
labels.dashboard_title_configuration=System Configuration
labels.suggest_search_log_enabled=Suggest from Search Words

    public Builder<E> add(E element) {
      super.add(element);
      return this;
    }

    /**
     * Adds each element of {@code elements} to the {@code ImmutableSortedSet}, ignoring duplicate
     * elements (only the first duplicate element is added).
     *
     * @param elements the elements to add
     * @return this {@code Builder} object
     * @throws NullPointerException if {@code elements} contains a null element

    private static final String PROCESS_HELPER = "processHelper";

    private static final String JOB_HELPER = "jobHelper";

    private static final String DUPLICATE_HOST_HELPER = "duplicateHostHelper";

    private static final String PATH_MAPPING_HELPER = "pathMappingHelper";

    private static final String POPULAR_WORD_HELPER = "popularWordHelper";

    //                                                                          ==========
    protected final String _tableDbName = "duplicate_host";
    protected final String _tableDispName = "duplicate_host";
    protected final String _tablePropertyName = "DuplicateHost";

    public String getTableDbName() {
        return _tableDbName;
    }

    @Override