return ((Map<?, ?>) value).isEmpty();
      } else if (value instanceof Optional) {
        return !((Optional) value).isPresent();
      } else if (value.getClass().isArray()) {
        return Array.getLength(value) == 0;
      }
      return false;
    }

    /**
     * Returns a string in the format specified by {@link MoreObjects#toStringHelper(Object)}.
     *

    canRunTogether: (T, T) -> Boolean = { _, _ -> true }
): List<R> {
    if (list.isEmpty()) {
        return noElementSplitFunction(expectedBucketNumber)
    }
    if (expectedBucketNumber == 1) {
        return listOf(smallElementAggregateFunction(list))
    }

    val expectedBucketSize = list.sumOf(toIntFunction) / expectedBucketNumber

    if (expectedBucketSize == 0) {

      return standardCeiling(e);
    }

    @Override
    public @Nullable T higher(T e) {
      return standardHigher(e);
    }

    @Override
    public @Nullable T pollFirst() {
      return standardPollFirst();
    }

    @Override
    public @Nullable T pollLast() {
      return standardPollLast();
    }

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

    }

    protected int getDefaultCurrentPageNumber() {
        return DEFAULT_CURRENT_PAGE_NUMBER;
    }

    public int getAllRecordCount() {
        return allRecordCount;
    }

    public void setAllRecordCount(final int allRecordCount) {
        this.allRecordCount = allRecordCount;
    }

    public int getAllPageCount() {
        return allPageCount;
    }

    }

    protected int getDefaultCurrentPageNumber() {
        return DEFAULT_CURRENT_PAGE_NUMBER;
    }

    public int getAllRecordCount() {
        return allRecordCount;
    }

    public void setAllRecordCount(final int allRecordCount) {
        this.allRecordCount = allRecordCount;
    }

    public int getAllPageCount() {
        return allPageCount;
    }

    }

    protected int getDefaultCurrentPageNumber() {
        return DEFAULT_CURRENT_PAGE_NUMBER;
    }

    public int getAllRecordCount() {
        return allRecordCount;
    }

    public void setAllRecordCount(final int allRecordCount) {
        this.allRecordCount = allRecordCount;
    }

    public int getAllPageCount() {
        return allPageCount;
    }

    public List<Integer> getPageNumberList() {
        return pageNumberList;
    }

    public void setPageNumberList(final List<Integer> pageNumberList) {
        this.pageNumberList = pageNumberList;
    }

    protected int getDefaultCurrentPageNumber() {
        return Constants.DEFAULT_ADMIN_PAGE_NUMBER;
    }

    protected int getDefaultPageSize() {
        return ComponentUtil.getFessConfig().getPagingPageSizeAsInteger();

    return delegateList.copyIntoArray(dst, offset);
  }

  @Override
  @CheckForNull
  @Nullable
  Object[] internalArray() {
    return delegateList.internalArray();
  }

  @Override
  int internalArrayStart() {
    return delegateList.internalArrayStart();
  }

  @Override
  int internalArrayEnd() {
    return delegateList.internalArrayEnd();
  }

abstract class ExtensibleEnums {

    static Language language(String id) {
        return new DefaultLanguage(id);
    }

    static PathScope pathScope(String id, ProjectScope projectScope, DependencyScope... dependencyScopes) {
        return new DefaultPathScope(id, projectScope, dependencyScopes);
    }

    static ProjectScope projectScope(String id) {
        return new DefaultProjectScope(id);
    }

		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyPartRange), url)
		return
	case errInvalidRangeSource:
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyPartRangeSource), url)
		return
	default:
		apiErr := errorCodes.ToAPIErr(ErrInvalidCopyPartRangeSource)
		apiErr.Description = err.Error()
		writeErrorResponse(ctx, w, apiErr, url)
		return
	}
}