code: func (batch *UpdateBatch) Get(ns string, key string) *VersionedValue {
  	nsUpdates, ok := batch.updates[ns]
  	if !ok {
  		return nil
  	}
  	vv, ok := nsUpdates.m[key]
  	if !ok {
  		return nil
  	}
  	return vv
  }
docs: // Get returns the VersionedValue for the given namespace and key