BookStack\Http\Controllers\BookController::__construct PHP Method

    public function __construct(BookRepo $bookRepo, PageRepo $pageRepo, ChapterRepo $chapterRepo, UserRepo $userRepo)
    {
        $this->bookRepo = $bookRepo;
        $this->pageRepo = $pageRepo;
        $this->chapterRepo = $chapterRepo;
        $this->userRepo = $userRepo;
        parent::__construct();
    }