/**
* @param \Magento\Quote\Model\Quote $quote
* @param \Magento\Quote\Model\Quote\Address\Total $total
*
* @return array|null
*/
public function fetch(\Magento\Quote\Model\Quote $quote, \Magento\Quote\Model\Quote\Address\Total $total)
{
$result = null;
$amount = $total->getDiscountCouponAmount();
$result = ['code' => $this->getCode(), 'title' => __('Discount Mercado Pago'), 'value' => $amount];
return $result;
}