code: public function run(InputInterface $input, OutputInterface $output)
      {
          $this->doPreRun($input, $output);
          $code = parent::run($input, $output);
          $this->doPostRun($input, $output, $code);
  
          return $code;
      }
docs: Run command.
  
  @param InputInterface  $input
  Input.
  @param OutputInterface $output
  Output.
  
  @return int
  Return code.