/**
* Retrieves Snapshot with id $id or throws an exception if it doesn't exist.
*
* @param $id
*
* @return SnapshotInterface
*
* @throws NotFoundHttpException
*/
protected function getSnapshot($id)
{
$snapshot = $this->snapshotManager->findOneBy(array('id' => $id));
if (null === $snapshot) {
throw new NotFoundHttpException(sprintf('Snapshot (%d) not found', $id));
}
return $snapshot;
}
