code: public function pop(?string $worker = null, ?int $numJobs = null)
      {
          $workerName = $worker ?: $this->client->getWorkerName();
          $jids = json_decode($this->client->pop($this->name, $workerName, $numJobs ?: 1), true);
  
          $jobs = [];
          array_map(function (array $data) use (&$jobs) {
              $job = new BaseJob($this->client, $data);
              $job->setEventsManager($this->getEventsManager());
  
              $jobs[] = $job;
          }, $jids ?: []);
  
          return $numJobs === null ? array_shift($jobs) : $jobs;
      }
docs: Get the next job on this queue.
  
  @param string|null $worker  Worker name popping the job.
  @param int         $numJobs Number of jobs to pop off of the queue.
  
  @return BaseJob|BaseJob[]|null
  
  @throws QlessException