Can't find source for some functions (e.g. AllocPOValuesFromF983051POData)


Hello all! I'm debugging a business function and I've come across a function in it called AllocPOValuesFromF983051POData. Is there any way to see where this function is defined? I've built COBLIB, COBJLIB, CCUSTOM, CALLBSFN, and I can't figure out where it is. I can't even right-click -> Go To Definition in Visual Studio.

(JDE 9.1)
It's a system kernel function - its prototype is defined in JDEKPRTO.H, found in the system\include folder.