public function listTalks()
 {
     $talks = Talk::orderBy('created_at')->get();
     return view('talk-list', ['talks' => $talks]);
 }
 /**
  * Display a listing of the resource.
  *
  * @return \Illuminate\Http\Response
  */
 public function index()
 {
     $talks = Talk::orderBy('starttime', 'asc')->take(1)->get();
     $talk = $talks->pop();
     return view('talk.details')->with(['talk' => $talk]);
 }