How to use _typeshed.wsgi with typing.get_type_hints

Hello there,
is there a way to get to work combination of _typeshed.wsgi and typing.get_type_hints in runtime?
In flask codebase there is something like

from __future__ import annotations

import typing as t

if t.TYPE_CHECKING:  # pragma: no cover
    from _typeshed.wsgi import WSGIApplication  # noqa: F401
    from werkzeug.datastructures import Headers  # noqa: F401
    from werkzeug.sansio.response import Response  # noqa: F401

# The possible types that are directly convertible or are a Response object.
ResponseValue = t.Union[
    "Response",
    str,
    bytes,
    t.List[t.Any],
    # Only dict is actually accepted, but Mapping allows for TypedDict.
    t.Mapping[str, t.Any],
    t.Iterator[str],
    t.Iterator[bytes],
]

# the possible types for an individual HTTP header
# This should be a Union, but mypy doesn't pass unless it's a TypeVar.
HeaderValue = t.Union[str, t.List[str], t.Tuple[str, ...]]

# the possible types for HTTP headers
HeadersValue = t.Union[
    "Headers",
    t.Mapping[str, HeaderValue],
    t.Sequence[t.Tuple[str, HeaderValue]],
]

# The possible types returned by a route function.
ResponseReturnValue = t.Union[
    ResponseValue,
    t.Tuple[ResponseValue, HeadersValue],
    t.Tuple[ResponseValue, int],
    t.Tuple[ResponseValue, int, HeadersValue],
    "WSGIApplication",
]

https://github.com/pallets/flask/blob/3.0.0/src/flask/typing.py
and in my application I use something like

from flask.typing import ResponseReturnValue

@inject
def my_endpoint() -> ResponseReturnValue:
    return "asdf"

...
def inject(method):
    ...
    arg_types = typing.get_type_hints(method)
    # get args from DI container and call actual function with injected args

which ends with error like

NameError: name 'Response' is not defined

Here is complete playground for my issue https://www.online-python.com/AsZX867MEO

I can probably use my own type for that - that's why I ask here - but not sure how to use typeshed in runtime.
Then I can probably send PR directly to flask with fix for such edge cases (as nobody probably encountered this based on how long this is in flask already).

Thanks for you tips and help in advice.

Start with Flask's src/flask/typing.py and the typing.get_type_hints call shown in the issue, then reproduce the NameError using the linked playground. Determine whether the runtime failure belongs in Flask or typeshed, and document a concrete resolution with a reproducing test or example.