Running an 'Action' (day-2) on a Multi Machine item on vRA 7

Hi

I see in vRA 7 the items now appears as 'Deployment' (for single machine item and for multi machine)

Any idea how to create a vRO workflow that will get this deployment and get the members of the deployment ? what is the object type and what action retrives the children ?

I couldn't find any documentation or blogs on that

Thanks a lot!