how getProperty from diffrents level of AML reponse

After applying an AML query, I have a response (structure with root and relation)

How can I get properties from each level of the response?
for example, I would like to get ID at different levels of the responses (Root and relationShip)

For first level..easy...with Item.getID();
But how to getProperty for relationShip (
r02xx_i0203GPHead) linked ?

Index = 1
type="i0213_AfterSales" id="4EBE1FC05B62427582A9FBB1BED9BF36
type="r02xx_i0203GPHead" id="2B3F208CCD88407A97AA14BD3A1E29B9

Index = 2
type="i0213_AfterSales"  id="DC2DCC728E534797BCF98CB00950F717
type="r02xx_i0203GPHead" id="1C88AEAFDDF641DC87ABB48777B3964B
Index = ...
 



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