code: func (do *Domain) GetSnapshotMeta(startTS uint64) (*meta.Meta, error) {
  	snapshot, err := do.store.GetSnapshot(kv.NewVersion(startTS))
  	if err != nil {
  		return nil, err
  	}
  	return meta.NewSnapshotMeta(snapshot), nil
  }
docs: // GetSnapshotMeta gets a new snapshot meta at startTS.