Add get_nested_attached_items helper
Add get_nested_attached_items helper

mvidalgarcia/indico,pferreir/indico,mic4ael/indico,mvidalgarcia/indico,DirkHoffmann/indico,mic4ael/indico,pferreir/indico,ThiefMaster/indico,mic4ael/indico,mvidalgarcia/indico,ThiefMaster/indico,OmeGak/indico,indico/indico,ThiefMaster/indico,pferreir/indico,indico/indico,DirkHoffmann/indico,indico/indico,mic4ael/indico,DirkHoffmann/indico,pferreir/indico,indico/indico,OmeGak/indico,ThiefMaster/indico,DirkHoffmann/indico,OmeGak/indico,mvidalgarcia/indico,OmeGak/indico