MapMakerInternalMap<K, V, ? extends InternalEntry<K, V, ?>, ? extends Segment<K, V, ?, ?>>
          makeMap(MapMaker maker) {
    return MapMakerInternalMap.create(maker);
  }

  private static MapMaker createMapMaker() {
    MapMaker maker = new MapMaker();
    maker.useCustomMap = true;
    return maker;
  }

  // constructor tests

  public void testDefaults() {

      MapMakerInternalMap<K, V, ? extends InternalEntry<K, V, ?>, ? extends Segment<K, V, ?, ?>>
          makeMap(MapMaker maker) {
    return MapMakerInternalMap.create(maker);
  }

  private static MapMaker createMapMaker() {
    MapMaker maker = new MapMaker();
    maker.useCustomMap = true;
    return maker;
  }

  // constructor tests

  public void testDefaults() {

  <function>
    <description>
      Returns a label name.
    </description>
    <name>label</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String label(java.lang.String)</function-signature>
    <example>
      ${fe:label("value")}
    </example>
  </function>

  <function>
    <description>
      Returns Date from a given value.
    </description>

    Comparator<? super K> comparator = delegate.comparator();
    if (comparator != null) {
      return comparator;
    }
    return NATURAL_ORDER;
  }

  @Override
  public boolean containsKey(Object key) {
    try {
      return delegate.containsKey(checkValid(key));
    } catch (NullPointerException | ClassCastException e) {
      return false;
    }
  }

  @Override
  public boolean containsValue(Object value) {

        return this.maxMpxCount;
    }

    @Override
    public String getNativeLanman() {
        return this.nativeLanMan;
    }

    @Override
    public String getNativeOs() {
        return this.nativeOs;
    }

    @Override
    public int getVcNumber() {
        return this.vcNumber;
    }

    @Override
    public int getCapabilities() {
        return this.capabilities;

            return null;
        }

        @Override
        public int getMajorVersion() {
            return 3;
        }

        @Override
        public int getMinorVersion() {
            return 0;
        }

        @Override
        public int getEffectiveMajorVersion() {
            return 3;
        }

        @Override
        public int getEffectiveMinorVersion() {

    return emptySet();
  }

  private static Collection<Method> suppressForEmptyNavigableMap() {
    return emptySet();
  }

  private static Collection<Method> suppressForEmptySortedMap() {
    return emptySet();
  }

  protected Collection<Method> suppressForSingletonMap() {
    return emptySet();
  }

  protected Collection<Method> suppressForHashMap() {
    return emptySet();
  }

    return delegate.descendingIterator();
  }

  @Override
  public NavigableSet<E> descendingSet() {
    return new SafeTreeSet<>(delegate.descendingSet());
  }

  @Override
  public E first() {
    return delegate.first();
  }

  @Override
  public @Nullable E floor(E e) {
    return delegate.floor(checkValid(e));
  }

  @Override
  public SortedSet<E> headSet(E toElement) {

    public NavigableSet<E> elementSet() {
      return new StandardElementSet();
    }

    @Override
    public Entry<E> firstEntry() {
      return standardFirstEntry();
    }

    @Override
    public Entry<E> lastEntry() {
      return standardLastEntry();
    }

    @Override
    public Entry<E> pollFirstEntry() {
      return standardPollFirstEntry();
    }

    @Override

    public Collection<V> values() {
        return parent.values();
    }

    @Override
    public Set<Entry<K, V>> entrySet() {
        // return original keys
        return parent.entrySet();
    }

    @Override
    public boolean equals(final Object o) {
        return parent.equals(o);
    }

    @Override
    public int hashCode() {
        return parent.hashCode();
    }