/**
  * Show the form for editing the specified Billboard.
  *
  * @param  int $id
  *
  * @return Response
  */
 public function edit($id)
 {
     $billboard = $this->billboardRepository->findWithoutFail($id);
     $billboard_owners = BillboardOwner::lists('name', 'id');
     $locations = Location::lists('city', 'id');
     if (empty($billboard)) {
         Flash::error('Billboard not found');
         return redirect(route('billboards.index'));
     }
     return view('billboards.edit', compact('billboard', 'billboard_owners', 'locations'));
 }