Neos\Flow\Monitor\FileMonitor::getIdentifier PHP Method

    public function getIdentifier()
    {
        return $this->identifier;
    }

 /**
  * Caches the file modification times
  *
  * @return void
  */
 public function shutdownObject()
 {
     if ($this->modificationTimesChanged === true) {
         $this->cache->set($this->fileMonitor->getIdentifier() . '_filesAndModificationTimes', json_encode($this->filesAndModificationTimes));
     }
 }