/**
     * {@link Boolean}に変換します。
     *
     * @param o
     *            変換元のオブジェクト
     * @return 変換された{@link Boolean}
     */
    public static Boolean toBoolean(final Object o) {
        if (o == null) {
            return null;
        } else if (o instanceof Boolean) {
            return (Boolean) o;
        } else if (o instanceof Number) {

    return backingMap.put(key, value);
  }

  @CanIgnoreReturnValue
  @CheckForNull
  final V remove(Object key) {
    checkNotNull(key);
    clearCache();
    return backingMap.remove(key);
  }

  final void clear() {
    clearCache();
    backingMap.clear();
  }

  @CheckForNull
  V get(Object key) {
    checkNotNull(key);
    V value = getIfCached(key);

     * @return The bean to configure, or {@code null} if none.
     */
    Object getBean();

    /**
     * Sets the bean to configure. Eventually, a valid request must have a bean set.
     *
     * @param bean The bean to configure, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    BeanConfigurationRequest setBean(Object bean);

    /**
     * Gets the configuration to unmarshal into the bean.

        // nothing
    }

    @Override
    public void invokeQuery(String columnFlexibleName, String conditionKeyName, Object conditionValue, ConditionOption conditionOption) {
        // nothing
    }

    @Override
    public void invokeQueryEqual(String columnFlexibleName, Object conditionValue) {
        // nothing
    }

        // nothing
    }

    @Override
    public void invokeQuery(String columnFlexibleName, String conditionKeyName, Object conditionValue, ConditionOption conditionOption) {
        // nothing
    }

    @Override
    public void invokeQueryEqual(String columnFlexibleName, Object conditionValue) {
        // nothing
    }

        final String scoreField = fessConfig.getRankFusionScoreField();
        final Map<String, Map<String, Object>> scoreDocMap = new HashMap<>();
        final String idField = fessConfig.getIndexFieldId();
        final Set<Object> mainIdSet = new HashSet<>();
        for (int i = 0; i < results.length; i++) {
            final List<Map<String, Object>> docList = results[i].getDocumentList();
            if (logger.isDebugEnabled()) {

   */
  static boolean safeRemove(Collection<?> collection, @CheckForNull Object object) {
    checkNotNull(collection);
    try {
      return collection.remove(object);
    } catch (ClassCastException | NullPointerException e) {
      return false;
    }
  }

  static class FilteredCollection<E extends @Nullable Object> extends AbstractCollection<E> {
    final Collection<E> unfiltered;

    }
  }

  private static <E extends @Nullable Object> E getElementOrThrow(@CheckForNull Entry<E> entry) {
    if (entry == null) {
      throw new NoSuchElementException();
    }
    return entry.getElement();
  }

  @CheckForNull
  private static <E extends @Nullable Object> E getElementOrNull(@CheckForNull Entry<E> entry) {
    return (entry == null) ? null : entry.getElement();

    protected String doBackward(T enumValue) {
      return enumValue.name();
    }

    @Override
    public boolean equals(@CheckForNull Object object) {
      if (object instanceof StringConverter) {
        StringConverter<?> that = (StringConverter<?>) object;
        return this.enumClass.equals(that.enumClass);
      }
      return false;
    }

    @Override
    public int hashCode() {

		if entry.API.Args != nil {
			args := ""
			if entry.API.Args.Bucket != "" {
				args = args + "bucket=" + entry.API.Args.Bucket
			}
			if entry.API.Args.Object != "" {
				args = args + ", object=" + entry.API.Args.Object
			}
			if entry.API.Args.VersionID != "" {
				args = args + ", versionId=" + entry.API.Args.VersionID
			}
			if len(entry.API.Args.Objects) > 0 {