code: func nameOfKeyValue(ei *dosa.EntityInfo) (string, string) {
  	keyName := ei.Def.Key.PartitionKeys[0]
  	cols := ei.Def.Columns
  	if cols[0].Name == keyName {
  		return keyName, cols[1].Name
  	}
  	return keyName, cols[0].Name
  }
docs: // return order is key, value