}

    protected boolean matchUserAgent(final PathMapping pathMapping) {
        if (!pathMapping.hasUAMathcer()) {
            return true;
        }

        if (SingletonLaContainerFactory.getExternalContext().getRequest() != null) {
            return LaRequestUtil.getOptionalRequest().map(request -> {
                final String userAgent = request.getHeader("user-agent");
                if (StringUtil.isBlank(userAgent)) {

                    params.getStartPosition(), pageSize, offset);
        }

        final ExternalContext externalContext = SingletonLaContainerFactory.getExternalContext();
        final OptionalThing<HttpServletRequest> requestOpt = LaRequestUtil.getOptionalRequest();
        final OptionalThing<HttpServletResponse> responseOpt = LaResponseUtil.getOptionalResponse();