code: public function add(\Symfony\Component\Console\Command\Command $command)
      {
          parent::add($command);
  
          // Add to command list.
          $commandName = $command->getName();
          $this->commands[$commandName] = $command;
          $this->commandAliases[$commandName][] = $commandName;
  
          foreach ($command->getAliases() as $alias) {
              $this->commands[$alias] = $command;
              $this->commandAliases[$commandName][] = $alias;
          }
  
          return $command;
      }
docs: {@inheritdoc}