/**
  * Handle an incoming request.
  *
  * @param  \Illuminate\Http\Request  $request
  * @param  \Closure  $next
  * @return mixed
  */
 public function handle($request, Closure $next)
 {
     $this->router->substituteBindings($route = $request->route());
     $this->router->substituteImplicitBindings($route);
     return $next($request);
 }