MC-32655: (GraphQL) Set default value of save_in_address_book to true when no value is specified

- Static failure fixes

Author: avattam06

app/code/Magento/QuoteGraphQl/Model/Cart/SetBillingAddressOnCart.php

@@ -67,29 +67,43 @@ public function execute(ContextInterface $context, CartInterface $cart, array $b
         $sameAsShipping = isset($billingAddressInput['same_as_shipping'])
             ? (bool)$billingAddressInput['same_as_shipping'] : $sameAsShipping;
 
+        $this->checkForInputExceptions($customerAddressId, $addressInput);
 
-        if (null === $customerAddressId && null === $addressInput) {
+        $addresses = $cart->getAllShippingAddresses();
+        if ($sameAsShipping && count($addresses) > 1) {
             throw new GraphQlInputException(
-                __('The billing address must contain either "customer_address_id" or "address".')
+                __('Using the "same_as_shipping" option with multishipping is not possible.')
             );
         }
 
-        if ($customerAddressId && $addressInput) {
+        $billingAddress = $this->createBillingAddress($context, $customerAddressId, $addressInput);
+
+        $this->assignBillingAddressToCart->execute($cart, $billingAddress, $sameAsShipping);
+    }
+
+
+    /**
+     * Check for the input exceptions
+     *
+     * @param int|null $customerAddressId
+     * @param array|null $addressInput
+     * @throws GraphQlInputException
+     */
+    private function checkForInputExceptions(
+        ?int $customerAddressId,
+        ?array $addressInput
+    ) {
+        if (null === $customerAddressId && null === $addressInput) {
             throw new GraphQlInputException(
-                __('The billing address cannot contain "customer_address_id" and "address" at the same time.')
+                __('The billing address must contain either "customer_address_id" or "address".')
             );
         }
 
-        $addresses = $cart->getAllShippingAddresses();
-        if ($sameAsShipping && count($addresses) > 1) {
+        if ($customerAddressId && $addressInput) {
             throw new GraphQlInputException(
-                __('Using the "same_as_shipping" option with multishipping is not possible.')
+                __('The billing address cannot contain "customer_address_id" and "address" at the same time.')
             );
         }
-
-        $billingAddress = $this->createBillingAddress($context, $customerAddressId, $addressInput);
-
-        $this->assignBillingAddressToCart->execute($cart, $billingAddress, $sameAsShipping);
     }
 
     /**