code: func (cache *VolumeCache) AddPV(pv *v1.PersistentVolume) {
  	cache.mutex.Lock()
  	defer cache.mutex.Unlock()
  
  	cache.pvs[pv.Name] = pv
  	glog.Infof("Added pv %q to cache", pv.Name)
  }
docs: // AddPV adds the PV object to the cache