System Information
Operating system: Windows 10
Graphics card: NVIDIA GeForce 1070
Blender Version
Broken: (example: 2.81)
Short description of error
The Multiple Classes section in the Python API info overview is out of date for Blender 2.80 and later.
According to Module Registration in the Blender Wiki bpy.utils.register_module has been removed.
Exact steps for others to reproduce the error
View the documentation of Multiple Classes.