How to rename Animation Node's Invoke Subprogram;s Generator Output? I use a loop to modify the (1) points, (2) left handles, and (3) right handles of a spline. I then produce 3 Vector lists and use them to create a new spline. 
The following pictures shows how the x-coord of points are modified. The actual node tree has more complex logic for the points and handles. 

There may be better way to I achieve the task. My question is not necessary about the best approach. The problem I have is that the 3 output lists are all named 'Vector List'. I have no way to tell which list is which when I am working them inside the Input Loop (because the actual layout of the nodes for manipulating the 3 Vector lists is not as neat as the attached picture). Is there a way to rename the 3 output lists so they can be descriptive. In this case I want them to match the input lists.

Thanks for any help.
Yes, it is possible to rename the Outputs of the Invoke Subprogram node and there are two ways to do that:

Select the Output Node:


Open the N-panel or properties panel --> Node --> Advanced Node Settings, there you can rename the output (blue box)
Or, press the U-key (which is a shortcut for the Output Node Settings), then a menu will appear in which you can rename the outputs (green box)