Grouping Sub-Chains in Langchain for RAG App Efficiency

I'm using langchain for my RAG app. Right now, I have 4 "sub" chains that I conditionally execute based on various things. So this means every user interaction/message, generates anywhere from 2-4 top level traces. I think these should be "grouped" under a top-level chain right? Is there anyway I can do that directly in my code? (not in langchain)?