In #911 I extended some support for userData in GSAnchor objects, but other things in the Glyphs API can take userData: we currently don't write out the userData for GSInstance, GSFeature (not needed?), GSComponent, GSPath, and GSGuide.
I also didn't make the GSAnchor userData round-trappable, so that should be fixed.
In #911 I extended some support for userData in GSAnchor objects, but other things in the Glyphs API can take userData: we currently don't write out the userData for GSInstance, GSFeature (not needed?), GSComponent, GSPath, and GSGuide.
I also didn't make the GSAnchor userData round-trappable, so that should be fixed.