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So I see that a FL font object has a "classes" attribute that's a list of the classes in the font.
1) Is there a way to filter this list to only see kerning classes?
2) When I try to copy kerning classes via script, e.g. —
fl.font2.classes = fl.font1.classes
This will copy the class members properly, but it loses the state of the left glyph / right glyph checkboxes in the class panel. Where does that data live?