Run a script on an instance level with LayerGeek

Hi,
which parameter should I set here?
font.setKerningForPair(font.selectedFontMaster.id, ‘T’, ‘@MMK_R_a’, -60)

SelectedFontMaster.id doesn’t work of course as I’m into a .interpolatedFont object

Sorry, I reply to myself, it could help someone else
etc.kerningForPair(interpolatedInst[i].masters[0].id, etc etc