protected function trackEcommerce($type = self::ECOMMERCE_TRANSACTION, array $options = [])
	{
        $this->addItem("ga('require', 'ecommerce');");
        $item = "ga('ecommerce:{$type}', { ";
        $item .= $this->assembleParameters($options);
        $item = rtrim($item, ', ') . " });";
        $this->addItem($item);
        $this->addItem("ga('ecommerce:send');");
	}