To note, there are undocumented detections to even Proxys, for example using `in` operator in v8 (such as `proxiedFunc in 1` for some proxied function). Really cool to see a project like this.
How do you use `in` in v8 to detect proxies? I assume its a difference in the exception, but the message and the cause were the same in both direct and proxied `x in 1`.
