$chapter = $this->entityRepo->getBySlug('chapter', $chapterSlug, $bookSlug);
$this->checkOwnablePermission('chapter-update', $chapter);
if ($chapter->name !== $request->get('name')) {
$chapter = $this->entityRepo->getBySlug('chapter', $chapterSlug, $bookSlug);
$this->checkOwnablePermission('chapter-update', $chapter);
if ($chapter->name !== $request->get('name')) {