public function showDelete($bookSlug, $chapterSlug)
{
$book = $this->bookRepo->getBySlug($bookSlug);
$chapter = $this->chapterRepo->getBySlug($chapterSlug, $book->id);
$this->checkOwnablePermission('chapter-delete', $chapter);
$this->setPageTitle('Delete Chapter' . $chapter->getShortName());
return view('chapters/delete', ['book' => $book, 'chapter' => $chapter, 'current' => $chapter]);
}