>>> from bpy.app.handlers import persistent
Traceback (most recent call last):
  File "<blender_console>", line 1, in <module>
  File "shibokensupport/signature/loader.py", line 61, in feature_imported
  File "shibokensupport/feature.py", line 135, in feature_imported
AttributeError: 'bpy.app.handlers' object has no attribute '__name__'