/**
  * Apply persistent data
  *
  * @param \Magento\Framework\Event\Observer $observer
  * @return $this
  */
 public function execute($observer)
 {
     if (!$this->_persistentData->canProcess($observer) || !$this->_persistentSession->isPersistent() || $this->_customerSession->isLoggedIn()) {
         return $this;
     }
     /** @var \Magento\Persistent\Model\Persistent\Config $persistentConfig */
     $persistentConfig = $this->_persistentConfigFactory->create();
     $persistentConfig->setConfigFilePath($this->_persistentData->getPersistentConfigFilePath())->fire();
     return $this;
 }
 /**
  * Apply persistent data to specific block
  *
  * @param \Magento\Framework\Event\Observer $observer
  * @return $this
  */
 public function execute(\Magento\Framework\Event\Observer $observer)
 {
     if (!$this->_persistentSession->isPersistent() || $this->_customerSession->isLoggedIn()) {
         return $this;
     }
     /** @var $block \Magento\Framework\View\Element\AbstractBlock */
     $block = $observer->getEvent()->getBlock();
     if (!$block) {
         return $this;
     }
     $configFilePath = $observer->getEvent()->getConfigFilePath();
     if (!$configFilePath) {
         $configFilePath = $this->_persistentData->getPersistentConfigFilePath();
     }
     /** @var $persistentConfig \Magento\Persistent\Model\Persistent\Config */
     $persistentConfig = $this->_persistentConfigFactory->create();
     $persistentConfig->setConfigFilePath($configFilePath);
     foreach ($persistentConfig->getBlockConfigInfo(get_class($block)) as $persistentConfigInfo) {
         $persistentConfig->fireOne($persistentConfigInfo, $block);
     }
     return $this;
 }