/** The key of the configuration. e.g. {role}guest */
    String ROLE_SEARCH_DEFAULT_DISPLAY_PERMISSIONS = "role.search.default.display.permissions";

    /** The key of the configuration. e.g. {role}guest */
    String ROLE_SEARCH_GUEST_PERMISSIONS = "role.search.guest.permissions";

    /** The key of the configuration. e.g. 1 */

    // TODO(cpovirk): Consider using Object[] anyway.
    E[] array = (E[]) elements.toArray();
    /*
     * For a Set, we guess that it contains no duplicates. That's just a guess for purpose of
     * sizing; if the Set uses different equality semantics, it might contain duplicates according
     * to equals(), and we will deduplicate those properly, albeit at some cost in allocations.

    public String getUsername() {
        final RequestManager requestManager = ComponentUtil.getRequestManager();
        return requestManager.findUserBean(FessUserBean.class).map(FessUserBean::getUserId).orElse(Constants.GUEST_USER);
    }

    public Date getCurrentTime() {
        return new Date(getCurrentTimeAsLong());
    }

    public long getCurrentTimeAsLong() {
        return System.currentTimeMillis();
    }