/**
* Call the given route filter.
*
* @param \Illuminate\Routing\Route $route
* @param string $filter
* @param \Symfony\Component\HttpFoundation\Request $request
* @param array $parameters
* @return mixed
*/
protected function callFilter($route, $filter, $request, $parameters = array())
{
if (isset($this->callbackFilters[$filter])) {
$callback = $this->callbackFilters[$filter];
return call_user_func_array($callback, array_merge(array($route, $request), $parameters));
}
return $route->callFilter($filter, $request, $parameters);
}