/** A list of label type items. */
    protected volatile List<LabelTypeItem> labelTypeItemList;

    /** A list of label type patterns. */
    protected volatile List<LabelTypePattern> labelTypePatternList;

    /**
     * Default constructor.
     */
    public LabelTypeHelper() {
        super();
    }

    /**
     * Initializes the helper.
     */
    @PostConstruct