code: func newUnschedulablePodsMap(metricRecorder metrics.MetricRecorder) *UnschedulablePodsMap {
  	return &UnschedulablePodsMap{
  		podInfoMap:     make(map[string]*podInfo),
  		keyFunc:        util.GetPodFullName,
  		metricRecorder: metricRecorder,
  	}
  }
docs: // newUnschedulablePodsMap initializes a new object of UnschedulablePodsMap.