$this->checkOwnablePermission('chapter-update', $chapter);
$chapter->fill($request->all());
$chapter->slug = $this->chapterRepo->findSuitableSlug($chapter->name, $book->id, $chapter->id);
$this->checkOwnablePermission('chapter-update', $chapter);
$chapter->fill($request->all());
$chapter->slug = $this->chapterRepo->findSuitableSlug($chapter->name, $book->id, $chapter->id);