How to get Default PrintMgmtValue

I try to get the default value from the printMgmtSettings but i want it as X++ Code.

I know the way to get the PrintMgmtDocInstance but i if it is not overridden at it is marked as default value there is no printMgmtDocInstance available.

So my question is how can i get the default value for, a specific report on a customer, PrintMgmt