Psr\Log\LoggerInterface::critical PHP Method

    public function critical($message, array $context = array());

 /**
  * {@inheritDoc}
  * @SuppressWarnings(PHPMD.NPathComplexity)
  */
 public function assign($cartId, \Magento\Quote\Api\Data\AddressInterface $address)
 {
     /** @var \Magento\Quote\Model\Quote $quote */
     $quote = $this->quoteRepository->getActive($cartId);
     if ($quote->isVirtual()) {
         throw new NoSuchEntityException(__('Cart contains virtual product(s) only. Shipping address is not applicable.'));
     }
     $saveInAddressBook = $address->getSaveInAddressBook() ? 1 : 0;
     $sameAsBilling = $address->getSameAsBilling() ? 1 : 0;
     $customerAddressId = $address->getCustomerAddressId();
     $this->addressValidator->validate($address);
     $quote->setShippingAddress($address);
     $address = $quote->getShippingAddress();
     if ($customerAddressId) {
         $addressData = $this->addressRepository->getById($customerAddressId);
         $address = $quote->getShippingAddress()->importCustomerAddressData($addressData);
     } elseif ($quote->getCustomerId()) {
         $address->setEmail($quote->getCustomerEmail());
     }
     $address->setSameAsBilling($sameAsBilling);
     $address->setSaveInAddressBook($saveInAddressBook);
     $address->setCollectShippingRates(true);
     try {
         $address->collectTotals()->save();
     } catch (\Exception $e) {
         $this->logger->critical($e);
         throw new InputException(__('Unable to save address. Please, check input data.'));
     }
     if (!$quote->validateMinimumAmount($quote->getIsMultiShipping())) {
         throw new InputException($this->scopeConfig->getValue('sales/minimum_order/error_message', \Magento\Store\Model\ScopeInterface::SCOPE_STORE, $quote->getStoreId()));
     }
     return $quote->getShippingAddress()->getId();
 }