How do I use LN Public interface functions that start sessions?

Can you be more specific?
Are you referring to extensions where you can call LN Public Interface functions?
I don't see starting sessions from there...

I am trying to do the submit and assign functions of the Non-Conformance report session(qmncm1100m000) for the business object I am creating. My plan was to use the public interface but I was not able to find submit and assign functions. I only saw the NonConformanceReport.StartDetail() function.
What I would like to know is if it possible to do the submit and assign functionalities using the StartDetail function.
Also, I would like to ask for suggestions on what I can do if that is not possible.