Currently the InsertAndUpdateLoopNode service currently has no output return.
The InsertAndUpdateNode service returns an output with a NodeCount result giving the number of nodes that were affected by the service.
I think the InsertAndUpdateLoopNode service should be updated to also return the NodeCount of affected nodes. This would help with consistency between the two services and can be helpful for debugging etc.
Let me know if/when this change is made so i can reflect it in the existing documentation! Thanks!