code: public function execute(InputInterface $input, OutputInterface $output)
      {
          parent::execute($input, $output);
  
          $pools = $this->registry->getCachePools();
  
          $rows = array();
  
          foreach ($pools as $name => $pool) {
              $rows[] = array($name, get_class($pool));
          }
  
          $table = new Table($output);
  
          $table->setHeaders(array('Name', 'Class'))
              ->setRows($rows);
  
          $table->render();
      }
docs: {@inheritdoc}