clearBackground not working

Scripting
1

I’m getting this error code
Traceback (most recent call last): File "<string>", line 2, in <module> AttributeError: 'NSKVONotifying_GSLayer' object has no attribute 'clearBackground'
using this code:
l = Glyphs.font.selectedLayers[0] l.clearBackground()

Version 2.3b (845)

2

The API has changed:

l.background.clear()