code: protected function execute(InputInterface $input, OutputInterface $output)
      {
  
          if (!is_null($input->getOption('type'))) {
              $type = $input->getOption('type');
          } else {
              $type = $this->getHelperSet()->get('dialog')->ask(
                  $output,
                  'Choose type in ' . implode(', ', $this->getContainer()->getParameter('open_orchestra_model.fixtures.command')) . ' (all) : ',
                  'all'
              );
          }
  
          $dm = $this->getContainer()->get('doctrine_mongodb')->getManager($input->getOption('dm'));
          $dirOrFile = $input->getOption('fixtures');
          if ($dirOrFile) {
              $paths = is_array($dirOrFile) ? $dirOrFile : array($dirOrFile);
          } else {
              $paths = $this->getContainer()->getParameter('doctrine_mongodb.odm.fixtures_dirs');
              $paths = is_array($paths) ? $paths : array($paths);
              foreach ($this->getContainer()->get('kernel')->getBundles() as $bundle) {
                  $paths[] = $bundle->getPath().'/DataFixtures/MongoDB';
              }
          }
  
          $loader = new OrchestraContainerAwareLoader($this->getContainer(), $type);
          foreach ($paths as $path) {
              if (is_dir($path)) {
                  $loader->loadFromDirectory($path);
              }
          }
  
          $fixtures = $loader->getFixtures();
          if (!$fixtures) {
              throw new \InvalidArgumentException(
                  sprintf('Could not find any fixtures of %s type to load in: %s', $type, "\n\n- ".implode("\n- ", $paths))
              );
          }
  
          $purger = new MongoDBPurger($dm);
          $executor = new MongoDBExecutor($dm, $purger);
          $executor->setLogger(function($message) use ($output) {
              $output->writeln(sprintf('  <comment>></comment> <info>%s</info>', $message));
          });
          $executor->execute($fixtures, $input->getOption('append'));
      }
docs: @param InputInterface  $input
  @param OutputInterface $output
  
  @return mixed
  @throws \InvalidArgumentException