Getting AssetID droped in multivalue(flextype) through ASSET API

Hi Guys,

I am using asset api and I have created session in my java code also got asset ID (textdata) and able to read it attribute like name etc simple. But this text data has one more attribute of flex type where I can drag and drop another flex asset. I want to read the attribute of the the dragged and dropped asset further, to do this I like to have the Id.

I looked in dev guide and found below code but not sure how to get id of this second asset.

AttributeData attrData = data.getAttributeData( "FSIIKeyword" );

List retData = attrData.getDataAsList();