public function displayMultiple($options = [])
    {
        if (!$this->options->get('multiple', $options)) {
            return '';
        }
        $renderHtml = '';
        foreach ($this->captchaAttributes as $captchaAttribute){
            $renderHtml .= "{$this->widgetIdName}[\"{$captchaAttribute['id']}\"]={$this->buildCaptchaHtml($captchaAttribute)}";
        }

        return "<script type=\"text/javascript\">var {$this->widgetIdName}={};var {$this->callbackName}=function(){{$renderHtml}};</script>";
    }