MAGETWO-35155: Error appears on Shipping Method page during MultiAdress Checkout if countries are not allowed for shipping

(cherry picked from commit 6cc59f5)

Author: Ievgen Shakhsuvarov

app/code/Magento/GiftMessage/Model/Type/Plugin/Multishipping.php

@@ -31,13 +31,13 @@ public function __construct(
 
     /**
      * @param \Magento\Multishipping\Model\Checkout\Type\Multishipping $subject
-     * @param array $methods
+     * @param array|null $methods
      * @return $this
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function beforeSetShippingMethods(
         \Magento\Multishipping\Model\Checkout\Type\Multishipping $subject,
-        array $methods
+        $methods
     ) {
         $giftMessages = $this->request->getParam('giftmessage');
         $quote = $subject->getQuote();