/**
* Checks if file is modified by some other user
*
* @param FileInterface $entity
* @param string $hash
* @throws FileHashChangedException
*/
protected function checksum(FileInterface $entity)
{
$currentHash = $this->fileManager->checksumTemporaryFileByName($entity->getName());
if ($entity->getHash() !== $currentHash) {
throw new FileHashChangedException($entity->getName());
}
}
