public function render()
    {
        if (empty($this->breadcrumbs)) {
            return '';
        }

        $cssClasses = implode(' ', $this->breadcrumbsCssClasses);

        return '<'. $this->listElement . ' itemscope itemtype="http://schema.org/BreadcrumbList"'
                .' class="' . $cssClasses .'">'
                . $this->renderCrumbs()
                . '</'. $this->listElement .'>';
    }