Current, `Matches` is a synchronized method, there is a situation where [asynchronous method are invoked synchronously](https://github.com/richardszalay/mockhttp/blob/3517eca8e799f6b9a7c7c4f1c99c99e8543dfbcd/RichardSzalay.MockHttp/Matchers/ContentMatcher.cs#L31).
Current,
Matchesis a synchronized method, there is a situation where asynchronous method are invoked synchronously.