Github #99: Sync "develop-storefront" with master branches

Author: le0n4ik

lib/internal/Magento/Framework/Api/DataObjectHelper.php

@@ -213,6 +213,7 @@ protected function setComplexValue(
             $object = $this->extensionFactory->create(get_class($dataObject), ['data' => $value]);
         } else {
             $object = $this->objectFactory->create($returnType, $value);
+            $this->populateWithArray($object, $value, $returnType);
         }
         $dataObject->$methodName($object);
         return $this;