26A loop new feature in Workflow. Please, I need help for a "hello world" test.

Summary:

Hello,

Just released 26A with plenty of new features.

Im just trying to get a loop in Workflow working but no way.

I just run a REST API GET in first node, to get some payables invoices, and then I would like to do something (run any subprocess, but firts I need to store or know where it is stored the InvoiceId) with each invoice, but I do not know the syntax. I have tried a few combinations with no success.

Taking advantage of the new feature export-import, I attach my code.

Any help would be appreciated.

Also if is there any detailed doc. regarding this new feature (not general comment telling this exists…) would be nice.