How to ascribe function (core, finish..) to the layers of the multilayered panel of the curtain wall

[Isaac Newton]

Good time of the day, gentlemen

Is it possible to ascribe the function to the layers of the multilayer panel of the curtain wall? Now, it's known that the latest version of ArchiCAD has a bug that prevents one even from chanign the materials of the multilayered panels:

But, even if the same thing is performed in the previous version, it seems that there is still no option of setting up the function:

such as this one, in the settings of the multilayered constructions:

[Laszlo Nagy]

That Curtain Wall panel is a Library Part, which means you would have to modify its GDL script and interface script so you can set a Skin Type for the individual Composite Skins, plus to make it able to respond to changes in Partial Structure Settings changes. Requires relatively advanced GDL skills I believe.