/**
* Render action.
*
* @param \Magento\Framework\DataObject $row
*
* @return string
*/
public function render(\Magento\Framework\DataObject $row)
{
$banner = $this->_bannerFactory->create()->setStoreViewId(null)->load($row->getBannerId());
$srcImage = $this->_storeManager->getStore()->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA) . $banner->getImage();
return '<image width="150" height="50" src ="' . $srcImage . '" alt="' . $banner->getImage() . '" >';
}