#20526: Absent ObjectManager fix.

Author: p-bystritsky

app/code/Magento/Eav/Setup/EavSetup.php

@@ -11,6 +11,7 @@
 use Magento\Eav\Model\ResourceModel\Entity\Attribute\Group\CollectionFactory;
 use Magento\Eav\Model\Validator\Attribute\Code;
 use Magento\Framework\App\CacheInterface;
+use Magento\Framework\App\ObjectManager;
 use Magento\Framework\Exception\LocalizedException;
 use Magento\Framework\Setup\ModuleDataSetupInterface;