code: protected function handleAddressChange(SaleInterface $sale)
      {
          $changed = false;
  
          // Update shipment method and amount
          if ($this->didDeliveryCountryChanged($sale)) {
              $changed |= $this->saleUpdater->updateShipmentMethodAndAmount($sale);
          }
  
          // Update discounts
          if ($this->isDiscountUpdateNeeded($sale)) {
              $changed |= $this->saleUpdater->updateDiscounts($sale, true);
          }
  
          // Update taxation
          if ($this->isTaxationUpdateNeeded($sale)) {
              $changed |= $this->saleUpdater->updateTaxation($sale, true);
          } elseif ($this->isShipmentTaxationUpdateNeeded($sale)) {
              $changed |= $this->saleUpdater->updateShipmentTaxation($sale, true);
          }
  
          return $changed;
      }
docs: Handles the address change.
  
  @param SaleInterface $sale
  
  @return bool