@Override
    protected void setupHtmlData(final ActionRuntime runtime) {
        super.setupHtmlData(runtime);
        runtime.registerData("helpLink", systemHelper.getHelpLink(fessConfig.getOnlineHelpNamePathmap()));
    }

    @Override
    protected String getActionRole() {
        return ROLE;
    }

    // ===================================================================================

     * The value is, e.g. pathmap <br>
     * comment: Online help key for path mapping.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getOnlineHelpNamePathmap();

    /**
     * Get the value for the key 'online.help.name.boostdoc'. <br>
     * The value is, e.g. boostdoc <br>
     * comment: Online help key for boost document.