/**
  * Render action.
  *
  * @param \Magento\Framework\DataObject $row
  *
  * @return string
  */
 public function render(\Magento\Framework\DataObject $row)
 {
     $storeViewId = $this->getRequest()->getParam('store');
     $banner = $this->_bannerFactory->create()->setStoreViewId($storeViewId)->load($row->getId());
     $srcImage = $this->_storeManager->getStore()->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA) . $banner->getImage();
     return '<image width="150" height="50" src ="' . $srcImage . '" alt="' . $banner->getImage() . '" >';
 }
 /**
  * before save.
  */
 public function beforeSave()
 {
     if ($this->getStoreViewId()) {
         $defaultStore = $this->_bannerFactory->create()->setStoreViewId(null)->load($this->getId());
         $storeAttributes = $this->getStoreAttributes();
         $data = $this->getData();
         foreach ($storeAttributes as $attribute) {
             if (isset($data['use_default']) && isset($data['use_default'][$attribute])) {
                 $this->setData($attribute . '_in_store', false);
             } else {
                 $this->setData($attribute . '_in_store', true);
                 $this->setData($attribute . '_value', $this->getData($attribute));
             }
             $this->setData($attribute, $defaultStore->getData($attribute));
         }
     }
     return parent::beforeSave();
 }