renderRegistrationErrors example

/** * Runs the current application. * * @return int 0 if everything went fine, or an error code */
    public function doRun(InputInterface $input, OutputInterface $output): int
    {
        $this->registerCommands();

        if ($this->registrationErrors) {
            $this->renderRegistrationErrors($input, $output);
        }

        $this->setDispatcher($this->kernel->getContainer()->get('event_dispatcher'));

        return parent::doRun($input, $output);
    }

    protected function doRunCommand(Command $command, InputInterface $input, OutputInterface $output): int
    {
        if (!$command instanceof ListCommand) {
            if ($this->registrationErrors) {