Method doExecute

/**
 * Internal function to execute the command.
 *
 * @param   InputInterface   $input   The input to inject into the command.
 * @param   OutputInterface  $output  The output to inject into the command.
 *
 * @return  integer  The command exit code
 *
 * @since   4.0.0
 */
protected function doExecute(InputInterface $input, OutputInterface $output) : int
{
    $symfonyStyle = new SymfonyStyle($input, $output);
    $symfonyStyle->title('Running Session Garbage Collection');
    $session = $this->getSessionService($input->getOption('application'));
    $gcResult = $session->gc();
    // Destroy the session started for this process
    $session->destroy();
    if ($gcResult === false) {
        $symfonyStyle->error('Garbage collection was not completed. Either the operation failed or it is not supported on your platform.');
        return Command::FAILURE;
    }
    $symfonyStyle->success('Garbage collection completed.');
    return Command::SUCCESS;
}