code: func (u *FakeAPIUtil) CreatePV(pv *v1.PersistentVolume) (*v1.PersistentVolume, error) {
  	if u.shouldFail {
  		return nil, fmt.Errorf("API failed")
  	}
  
  	u.createdPVs[pv.Name] = pv
  	u.cache.AddPV(pv)
  	return pv, nil
  }
docs: // CreatePV will add the PV to the created list and cache