* @return void
     */
    public function handleShutdown()
    {
        // If we reached this step, we are in shutdown handler.
        // An exception thrown in a shutdown handler will not be propagated
        // to the exception handler. Pass that information along.
        $this->canThrowExceptions = false;
 
        // If we are not currently registered, we should not do anything
        if (!$this->isRegistered) {
            return;
        }
 
        $error = $this->system->getLastError();
        if ($error && Misc::isLevelFatal($error['type'])) {
            // If there was a fatal error,
            // it was not handled in handleError yet.
            $this->allowQuit = false;
            $this->handleError(
                $error['type'],
                $error['message'],
                $error['file'],
                $error['line']
            );
        }
    }
 
 
    /**
     * @param InspectorFactoryInterface $factory
     *
     * @return void
     */
    public function setInspectorFactory(InspectorFactoryInterface $factory)
    {
        $this->inspectorFactory = $factory;
    }
 
    public function addFrameFilter($filterCallback)