Description of the Issue

Type hints are present for methods, but type hints for objects (e.g. File) are missing the attributes. Running a tool like mypy or intellij with type hinting complains about attributes:
"Item" has no attribute "content_created_at" [attr-defined]

Steps to Reproduce

pip install mypy
mypy test/unit/object/test_folder.py

or open test_folder.py in Intellij

Error Message, Including Stack Trace

get errors like on line 286 assert new_file.description == file_description # File has no attribute 'description'

Versions Used

Python SDK: 3.0.1, python 3.8.8