code: func (os *OpenStack) NewBlockStorageV1() (*gophercloud.ServiceClient, error) {
  	storage, err := openstack.NewBlockStorageV1(os.provider, gophercloud.EndpointOpts{
  		Region: os.region,
  	})
  	if err != nil {
  		glog.Errorf("Unable to initialize cinder v1 client for region: %s", os.region)
  		return nil, err
  	}
  	return storage, nil
  }
docs: // NewBlockStorageV1 creates a new BlockStorage V1 endpoint
  // TODO(xyang): This should be removed at some point after the OpenStack Queens release
  // because V1 API has been deprecated for many releases and was finally removed from Cinder in Queens.