reportPrivateUsage behaves differently when a global variable is modified inside a method on a class

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# foo.py

_foo = 1
_bar = 1

class Foo:
    def asdf(self) -> None:
        global _foo
        _foo = 1

def asdf():
    global _bar
    _bar = 1

# bar.py

from foo import _bar, _foo # error: reportPrivateUsage (on both)

print(_foo) # error: reportPrivateUsage
print(_bar) # no error

i think ideally it should only complain on the import. suppressing the error there should be enough to tell the type checker that you're using a private variable intentionally