finish handling the request and return the response

HttpKernel.php

//vendor/symfony/http-kernel/HttpKernel.php
<?php
private function handleRaw(Request $request, int $type = self::MASTER_REQUEST): Response
{
    //...previous stages
        
    // call controller
    $response = $controller(...$arguments);

    // view
    if (!$response instanceof Response) {
        $event = new ViewEvent($this, $request, $type, $response);
        $this->dispatcher->dispatch($event, KernelEvents::VIEW);
        //...
    }
    return $this->filterResponse($response, $request, $type);
}

private function filterResponse(Response $response, Request $request, int $type): Response
{
    $event = new ResponseEvent($this, $request, $type, $response);
    $this->dispatcher->dispatch($event, KernelEvents::RESPONSE);
    $this->finishRequest($request, $type);
    return $event->getResponse();
}

private function finishRequest(Request $request, int $type)
{
    $this->dispatcher->dispatch(new FinishRequestEvent($this, $request, $type), KernelEvents::FINISH_REQUEST);
    $this->requestStack->pop();
}