Need to call an object function from global function in CX Sales - how?

Summary:

Use a global function to call and pass data to an object function

Content (please ensure you mask any confidential information):

Hi all,

I'm driving myself nuts trying to figure out what is probably a very simple requirement and how to implement. If you have any advice I'd be grateful. There are plenty of examples of calling a global function within an object function, but no examples I can find of calling an object function within a global function.

Requirement: Due to CX Sales having limited/no logging capability for us developers outside of a sandbox, I need to be able to capture and persist error messages, trace information or anything else I might want to output. One way to do that is to create a custom object (