shim.GetStateByPartialCompositeKey迭代器在此代码中如何工作？

I am writing the chaincode in which I am putting some data into ledger and then tried to list it using shim.GetStateByPartialCompositeKey() where I get the list of my data from the iterator. Now I want to sort my data according to the timestamp(which is formatted in terms of date only and not taking hours, minutes or seconds). So, I want to know if the data I listed from the iterator comes in sorted order in terms of timestamp in which they are stored in ledger or do I need to sort them?!

var AvalList = make([]A, 0)
iterator, err := stub.GetStateByPartialCompositeKey("AId~BId", []string{AId})
    if err != nil {
        fmt.Println("error is ", err)
        return shim.Error(err.Error())
    }
    fmt.Println("Iterator is ", iterator)
    if !iterator.HasNext() {
        fmt.Println("---------------------  Iterator not found!!!  --------------------")
        return shim.Error(err.Error())
    }
    defer iterator.Close()

    for i := 0; iterator.HasNext(); i++ {
        ARange, err := iterator.Next()
        if err != nil {
            return shim.Error(err.Error())
        }

        objectType, compositeKeyParts, err := stub.SplitCompositeKey(ARange.Key)
        if err != nil {
            return shim.Error(err.Error())
        }

        returnedA := compositeKeyParts[1]
        fmt.Printf("Found a A of index %s and id %s ", objectType, returnedA)

        ABytes, err := stub.GetState(returnedA)
        if err != nil {
            return shim.Error(err.Error())
        }
        if ABytes == nil {
            fmt.Println("A not found")
            return shim.Error("Entity not found")
        }


        a := A{}
        err = json.Unmarshal(ABytes, &a)
        if err != nil {
            return shim.Error("Failed to unmarshal")
        }

            AvalList = append(AvalList, a)
    }