code: protected function execute(InputInterface $input, OutputInterface $output)
      {
          $this->bootstrap($input, $output);
          $versions = $this->getAdapter()->fetchAll();
          $down = [];
          foreach($this->getMigrations() as $migration) {
              if (!in_array($migration->getVersion(), $versions)) {
                  $down[] = $migration;
              }
          }
  
          if (!empty($down)) {
              $rows = [];
              foreach($down as $migration) {
                  $status = '<error> DOWN </error>';
                  $rows[] = [
                      $status, 
                      $migration->getVersion(), 
                      $migration->getName(), 
                      date('d M Y H:i:s', strtotime($migration->getVersion()))
                  ];
              }
  
              $table = new Table($output);
              $table->setHeaders(array('Status', 'Migration ID', 'Migration Name', 'Created at'))
                  ->setRows($rows)
              ;
              $table->render();
          }
  
          return 0;
      }
docs: {@inheritdoc}