protected function execute(
        \Symfony\Component\Console\Input\InputInterface $input,
        \Symfony\Component\Console\Output\OutputInterface $output
    ) {
        /* bind $output context to log-methods. */
        $this->setOut($output);
        $this->logInfo("Command '" . $this->getName() . "' is started.");
        try {
            $req = new ARequest();
            $this->servClean->exec($req);
        } catch (\Throwable $e) {
            $this->logError("Command '" . $this->getName() . "' failed. Reason: " . $e->getMessage());
        }
        $this->logInfo("Command '" . $this->getName() . "' is completed.");

    }