code: protected function reserveJob($tube)
      {
          try {
              return $this->getPheanstalk()->reserveFromTube($tube, 0);
          } catch (ServerException $e) {
              if ($this->isNotFoundException($e)) {
                  return;
              }
  
              throw $e;
          }
      }
docs: Reserve a job from the tube.
  
  @param $tube
  
  @throws ServerException
  @throws \Exception
  
  @return bool|object|\Pheanstalk\Job|void