Remove direct use of object manager

added null

Author: AnshuMishra17

app/code/Magento/Cms/Controller/Adminhtml/Page/Index.php

@@ -7,6 +7,8 @@
 
 use Magento\Framework\App\Action\HttpGetActionInterface;
 use Magento\Backend\App\Action\Context;
+use Magento\Framework\App\ObjectManager;
+use Magento\Framework\App\Request\DataPersistorInterface;
 use Magento\Framework\View\Result\PageFactory;
 
 /**
@@ -26,16 +28,24 @@ class Index extends \Magento\Backend\App\Action implements HttpGetActionInterfac
      */
     protected $resultPageFactory;
 
+    /**
+     * @var DataPersistorInterface
+     */
+    private $dataPersistor;
+
     /**
      * @param Context $context
      * @param PageFactory $resultPageFactory
+     * @param DataPersistorInterface $dataPersistor
      */
     public function __construct(
         Context $context,
-        PageFactory $resultPageFactory
+        PageFactory $resultPageFactory,
+        DataPersistorInterface $dataPersistor = null
     ) {
         parent::__construct($context);
         $this->resultPageFactory = $resultPageFactory;
+        $this->dataPersistor = $dataPersistor ?: ObjectManager::getInstance()->get(DataPersistorInterface::class);
     }
 
     /**
@@ -52,8 +62,7 @@ public function execute()
         $resultPage->addBreadcrumb(__('Manage Pages'), __('Manage Pages'));
         $resultPage->getConfig()->getTitle()->prepend(__('Pages'));
 
-        $dataPersistor = $this->_objectManager->get(\Magento\Framework\App\Request\DataPersistorInterface::class);
-        $dataPersistor->clear('cms_page');
+        $this->dataPersistor->clear('cms_page');
 
         return $resultPage;
     }