$chapter = $this->chapterRepo->getBySlug($chapterSlug, $book->id);
$this->checkOwnablePermission('restrictions-manage', $chapter);
$this->chapterRepo->updateEntityPermissionsFromRequest($request, $chapter);
$chapter = $this->chapterRepo->getBySlug($chapterSlug, $book->id);
$this->checkOwnablePermission('restrictions-manage', $chapter);
$this->chapterRepo->updateEntityPermissionsFromRequest($request, $chapter);