Accessing global options

I don't see how to handle global options with the new 2.0 API.

```

var cmd = //... some Command, the RootCommand is somewhere else created, not accessible here
var arg = new Argument("x", "Mysterious x");

cmd.SetHandler(async (string x) =>
{
await DoSomething(x);
},
someArgument);`

```
**Question:** How to access/fill global options in this case?