* separator between each, to {@code appendable}.
   */
  @CanIgnoreReturnValue
  public <A extends Appendable> A appendTo(A appendable, Iterable<? extends @Nullable Object> parts)
      throws IOException {
    return appendTo(appendable, parts.iterator());
  }

  /**

     */
    public static <T extends Map<String, Object>> T copyMapToNewMap(final Map<String, ? extends Object> src,
            final Class<? extends T> destClass) {
        return copyMapToNewMap(src, destClass, DEFAULT_OPTIONS);
    }

    public static <T extends Map<String, Object>> T copyMapToNewMap(final Map<String, ? extends Object> src,
            final Class<? extends T> destClass, final Consumer<CopyOptions> option) {

  public void putAll(Map<? extends Class<? extends @NonNull B>, ? extends B> map) {
    Map<Class<? extends @NonNull B>, B> copy = new LinkedHashMap<>(map);
    for (Entry<? extends Class<? extends @NonNull B>, B> entry : copy.entrySet()) {
      cast(entry.getKey(), entry.getValue());
    }
    super.putAll(copy);
  }

  @CanIgnoreReturnValue
  @Override
  @CheckForNull

    }

    protected <ENTITY extends BadWord> ENTITY doSelectByPK(String id, Class<? extends ENTITY> tp) {
        return doSelectEntity(xprepareCBAsPK(id), tp);
    }

    protected BadWordCB xprepareCBAsPK(String id) {
        assertObjectNotNull("id", id);
        return newConditionBean().acceptPK(id);
    }

    }

    protected <ENTITY extends FileAuthentication> ENTITY doSelectByPK(String id, Class<? extends ENTITY> tp) {
        return doSelectEntity(xprepareCBAsPK(id), tp);
    }

    protected FileAuthenticationCB xprepareCBAsPK(String id) {
        assertObjectNotNull("id", id);
        return newConditionBean().acceptPK(id);
    }

    }

    protected <ENTITY extends KeyMatch> ENTITY doSelectByPK(String id, Class<? extends ENTITY> tp) {
        return doSelectEntity(xprepareCBAsPK(id), tp);
    }

    protected KeyMatchCB xprepareCBAsPK(String id) {
        assertObjectNotNull("id", id);
        return newConditionBean().acceptPK(id);
    }

    }

    protected <ENTITY extends RequestHeader> ENTITY doSelectByPK(String id, Class<? extends ENTITY> tp) {
        return doSelectEntity(xprepareCBAsPK(id), tp);
    }

    protected RequestHeaderCB xprepareCBAsPK(String id) {
        assertObjectNotNull("id", id);
        return newConditionBean().acceptPK(id);
    }

    }

    protected <ENTITY extends DuplicateHost> ENTITY doSelectByPK(String id, Class<? extends ENTITY> tp) {
        return doSelectEntity(xprepareCBAsPK(id), tp);
    }

    protected DuplicateHostCB xprepareCBAsPK(String id) {
        assertObjectNotNull("id", id);
        return newConditionBean().acceptPK(id);
    }

   */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      MapDifference<K, V> difference(
          Map<? extends K, ? extends V> left, Map<? extends K, ? extends V> right) {
    if (left instanceof SortedMap) {
      @SuppressWarnings("unchecked")
      SortedMap<K, ? extends V> sortedLeft = (SortedMap<K, ? extends V>) left;
      return difference(sortedLeft, right);
    }

   *
   * @since 23.1
   */
  public static <T extends @Nullable Object, K extends Comparable<? super K>, V>
      Collector<T, ?, ImmutableRangeMap<K, V>> toImmutableRangeMap(
          Function<? super T, Range<K>> keyFunction,
          Function<? super T, ? extends V> valueFunction) {
    return CollectCollectors.toImmutableRangeMap(keyFunction, valueFunction);
  }

  /**