public function setCoupon()
    {
        foreach ($this->cart->getExternalCoupons() as $coupon) {
            $this->setCouponToQuote($coupon);
        }

        return $this->quote;
    }
public function setCoupon()
    {
        foreach ($this->cart->getExternalCoupons() as $coupon) {
            $this->setCouponToQuote($coupon);
        }

        return $this->quote;
    }
public function setCoupon ( ) { foreach ( $ this -> cart -> getExternalCoupons ( ) as $ coupon ) { $ this -> setCouponToQuote ( $ coupon ) ; } return $ this -> quote ; }
Sets coupon to quote

@return Quote
Sets coupon to quote