Hey there!
The following string:
from RhinoInside.Revit.External.DB import Extensions
doesn’t work anymore for Python in Grasshopper (It was working in previous versions of Rhino.Inside.Revit).
Where are the Extensions situated for now? I need this library for crucial Revit API hidden commands to work. For instance get_BoundingBox() or get_Geometry() methods were very crucial for lots of use-cases.