Inferred Optional type of wrapper function arguments

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-01-13.07:48:07.965>
labels = ['type-bug']
title = 'Inferred Optional type of wrapper function arguments'
updated_at = <Date 2021-01-13.07:48:07.965>
user = 'https://github.com/wyfo'

bugs.python.org fields:

activity = <Date 2021-01-13.07:48:07.965>
actor = 'joperez'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2021-01-13.07:48:07.965>
creator = 'joperez'
dependencies = []
files = []
hgrepos = []
issue_num = 42921
keywords = []
message_count = 1.0
messages = ['385005']
nosy_count = 1.0
nosy_names = ['joperez']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue42921'
versions = []