Expose Fake.TryGetFakeManager and Fake.IsFake

I wonder if it would be possible to make Fake.TryGetFakeManager public?

I have a test utility that makes auto-wrapping fakes and I would like to ensure that the provided object is not already a fake - preferably without catching an exception 😃

[blairconrad]

Okay, @thomaslevesque. I’m convinced. On Fake,

public static bool TryGetFakeManager(object potentialFake, out FakeManager fakeManager);
public static bool IsFake(object potentialFake);

(If this gets added after nullability warnings are enabled, I’d mark the fakeManager parameter in the first call with a NotNullWhen(true).)

Should be fairly straightforward, even including updating the Advanced Usage docs.

[blairconrad]

Thanks for proposing and implementing this issue, @asgerhallas. Look for your name in the release notes! 🥇