public function escapeHtml($text)
    {
        if (!$this->escapeHtmlHelper) {
            $this->escapeHtmlHelper = $this->getView()->plugin('escapehtml');
            if (!$this->escapeHtmlHelper instanceof EscapeHtml) {
                throw new Exception\RuntimeException('Helper not loaded: escapeHtml');
            }
        }
        return $this->escapeHtmlHelper->__invoke($text);
    }