/**
  * Remove the specified resource from storage.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function destroy(Car $car)
 {
     if ($car->repairs->count() == 0) {
         $car->delete();
         return Redirect::route('cars.index')->with('message', 'Car deleted');
     }
     return Redirect::route('cars.index')->with('message', 'Car NOT deleted; delete the associated cars first');
 }