Blackfire\Player\Player::registerHandlers PHP Method

    private function registerHandlers()
    {
        if ($this->handlersRegistered) {
            return;
        }
        foreach ($this->clients as $client) {
            $stack = $client->getConfig('handler');
            $stack->unshift(StepMiddleware::create($this->getRequestFactory(), $this->getLanguage(), $this->extensions, $this->logger), 'scenario');
            $stack->push(ExpectationsMiddleware::create($this->getLanguage(), $this->logger), 'expectations');
            foreach ($this->extensions as $extension) {
                $extension->registerHandlers($stack);
            }
        }
        $this->handlersRegistered = true;
    }