code: public function run(PayloadInterface $payload)
      {
          /** @var ArrayPayload $payload */
          $payload->setData(
              array_merge(
                  $payload->getData(),
                  array(
                      __CLASS__ => true
                  )
              )
          );
  
          return 1;
      }
docs: Executes the task.
  
  @param PayloadInterface $payload
  
  @return null|int The exit status code