Suggestion

Here is an example or am I missing something?

 

 

But inside the sub-transformation , they are treated as 3 different inputs so whatever action I create for one, I would have to creat it a separate one for the other 2.  For example, If I want to left trim each field inside the subtrasformation I would need 3 left trim objects.  I was hoping I can reuse, so it is one left trim for all 3.  Does that make sense?