Ladybug modules relying on Rhino.Geometry.Collections seem not to work in Rhino 8 (Python 3)

I am trying to import functions like from ladybug_rhino.togeometry import to_face3d, however, the functions fail when imported in a Rhino 8 Python 3 script because it seems that RhinoCommon API has changed (although I can’t find any documentation about this beyond this thread). Specifically, lines like b_face.Loops.Item[count].To3dCurve().TryGetPolyline() fail because the .Item[count] syntax is not available, it should now instead be b_face.Loops.[count].To3dCurve().TryGetPolyline() which works. Am I missing something?