No equivalent of `inspect.getcoroutinestate` for PyAsyncGenASend instances

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-08-06.01:20:30.940>
labels = ['type-bug', '3.8', '3.9']
title = 'No equivalent of `inspect.getcoroutinestate` for PyAsyncGenASend instances'
updated_at = <Date 2021-03-06.17:47:09.352>
user = 'https://github.com/GeeTransit'

bugs.python.org fields:

activity = <Date 2021-03-06.17:47:09.352>
actor = 'graingert'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Demos and Tools']
creation = <Date 2019-08-06.01:20:30.940>
creator = 'GeeTransit'
dependencies = []
files = []
hgrepos = []
issue_num = 37771
keywords = []
message_count = 1.0
messages = ['349093']
nosy_count = 4.0
nosy_names = ['alex.gronholm', 'yselivanov', 'graingert', 'GeeTransit']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue37771'
versions = ['Python 3.8', 'Python 3.9']